{"id":9454,"date":"2026-09-16T09:00:00","date_gmt":"2026-09-16T09:00:00","guid":{"rendered":"https:\/\/www.simplywise.com\/blog\/?p=9454"},"modified":"2026-09-16T20:27:08","modified_gmt":"2026-09-16T20:27:08","slug":"roof-pitch-calculator","status":"publish","type":"post","link":"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/","title":{"rendered":"Roof Pitch Calculator"},"content":{"rendered":"<p><script>\ndocument.addEventListener('DOMContentLoaded', function() {\n  var sels = ['.entry-header','.page-header','article > h1:first-child','.entry-footer'];\n  sels.forEach(function(s){document.querySelectorAll(s).forEach(function(el){el.style.display='none';});});\n  var el = document.querySelector('.sw-a');\n  while (el && el !== document.body) {\n    el.style.maxWidth='100%'; el.style.width='100%'; el.style.padding='0'; el.style.margin='0';\n    el.style.float='none'; el.style.flex='0 0 100%';\n    el = el.parentElement;\n  }\n  document.body.style.marginTop='0'; document.body.style.paddingTop='0';\n});\n<\/script>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Inter:wght@400;500;600;700;800&#038;display=swap\" rel=\"stylesheet\">\n<style id=\"pm-style\">.single-post .entry-header,.single-post .entry-meta,.single-post .page-header,.single-post article>h1:first-child{display:none !important;}.single-post .post-tags,.single-post .entry-footer,.single-post .breadcrumb-nav{display:none !important;}.single-post article.post .entry-content{padding-top:0 !important;margin-top:0 !important;max-width:100% !important;width:100% !important;}.single-post .content-area,.single-post #primary,.single-post .site-main{padding:0 !important;max-width:100% !important;width:100% !important;}.single-post .row--index>.col-xs-12{padding-left:0 !important;padding-right:0 !important;}.single-post .row.no-pad>[class*=\"col-\"]{width:100% !important;max-width:100% !important;flex:0 0 100% !important;margin-left:0 !important;padding-left:0 !important;padding-right:0 !important;}.single-post article.post,.single-post article.pm{max-width:100% !important;width:100% !important;margin:0 !important;padding:0 !important;float:none !important;flex:0 0 100% !important;}.single-post .container,.single-post .container-fluid{max-width:100% !important;width:100% !important;padding-left:0 !important;padding-right:0 !important;}.single-post .row--index,.single-post .row.no-pad,.single-post .site-content{max-width:100% !important;width:100% !important;margin-left:0 !important;margin-right:0 !important;padding-left:0 !important;padding-right:0 !important;}.pm *{box-sizing:border-box;}.pm{margin:0;background:#f8fafc;color:#3f3f46;font-family:'Inter',-apple-system,'Segoe UI',sans-serif;font-size:16.5px;line-height:1.7;-webkit-font-smoothing:antialiased;max-width:100%;width:100%;}.pm__inner{max-width:720px;margin:0 auto;padding:0 24px;}.pm a{color:#2563eb;text-decoration:none;font-weight:500;}.pm h1,.pm h2,.pm h3{color:#111827;font-weight:700;letter-spacing:-.025em;}.pm strong{color:#111827;font-weight:700;}.pm__hero{padding:72px 0 12px;text-align:center;background:#fff;border-bottom:1px solid #eef1f5;}.pm__crumb{font:500 13px Inter;color:#9ca3af;margin-bottom:20px;}.pm__eyebrow{display:inline-flex;align-items:center;gap:7px;font:600 12px Inter;letter-spacing:.05em;color:#2563eb;background:#fff;border:1px solid #e5e7eb;box-shadow:0 1px 2px rgba(16,24,40,.04);padding:6px 13px;border-radius:999px;}.pm__eyebrow::before{content:\"\";width:6px;height:6px;border-radius:50%;background:#2563eb;}.pm__hero h1{font-size:45px;line-height:1.12;margin:22px auto 16px;max-width:660px;letter-spacing:-.03em;}.pm__rating{display:flex;justify-content:center;align-items:center;gap:8px;margin:4px 0 18px;font:600 13.5px Inter;color:#4b5563;}.pm__stars{color:#f59e0b;letter-spacing:2px;font-size:15px;}.pm__rating-sub{color:#9ca3af;font-weight:500;}.pm__dek{font-size:19px;line-height:1.55;color:#6b7280;max-width:600px;margin:0 auto 12px;}.pm__dek-cta{font-size:15px;line-height:1.5;color:#6b7280;max-width:600px;margin:0 auto 22px;}.pm__dek-cta a{color:#2563eb;font-weight:600;text-decoration:none;border-bottom:1.5px solid rgba(37,99,235,.35);padding-bottom:1px;}.pm__dek-cta a:hover{border-bottom-color:#2563eb;}.pm__meta{display:inline-flex;gap:11px;align-items:center;color:#9ca3af;font:500 13px Inter;}.pm__meta i{width:3px;height:3px;border-radius:50%;background:#d1d5db;}.pm__fig{margin:40px auto 0;max-width:940px;padding:0 24px;}.pm__fig img{width:100%;height:auto;border-radius:16px;aspect-ratio:2\/1;object-fit:cover;box-shadow:0 8px 30px rgba(16,24,40,.10);display:block;}.pm__body{padding:44px 0 60px;}.pm h2{font-size:30px;line-height:1.18;margin:50px 0 16px;}.pm h3{font-size:20px;margin:28px 0 8px;}.pm p{margin:0 0 20px;}.pm ul,.pm ol{margin:0 0 20px;padding-left:24px;}.pm li{margin-bottom:8px;}.pm__tldr{background:#fff;border:1px solid #eceef1;border-radius:16px;box-shadow:0 2px 12px rgba(16,24,40,.05);padding:26px 30px;margin:0 0 20px;}.pm__tldr-label{display:inline-flex;align-items:center;gap:8px;font:700 11.5px Inter;letter-spacing:.1em;text-transform:uppercase;color:#2563eb;margin-bottom:12px;}.pm__tldr ol{margin:0;padding-left:20px;color:#4b5563;font-size:15.5px;line-height:1.6;}.pm__tldr li{margin-bottom:7px;}.pm__tldr-cta{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid #dbe6ff;padding-top:16px;margin-top:14px;font-size:14.5px;}.pm__tldr-cta span{color:#111827;font-weight:500;}.pm__tldr-cta a{display:inline-flex;align-items:center;white-space:nowrap;padding:10px 20px;border-radius:8px;font-size:14px;font-weight:600;background:#2563eb;color:#fff;text-decoration:none;}.pm ol.pm__steps{list-style:none;counter-reset:s;padding:0;margin:20px 0 32px;display:grid;gap:10px;}.pm__steps>li{counter-increment:s;position:relative;background:#fff;border:1px solid #eceef1;border-radius:12px;padding:18px 22px 18px 66px;box-shadow:0 1px 2px rgba(16,24,40,.04);}.pm__steps>li::before{content:counter(s);position:absolute;left:18px;top:18px;width:34px;height:34px;background:#eff4ff;color:#2563eb;border-radius:9px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;}.pm__steps h3{margin:0 0 4px;font-size:17px;}.pm__steps p{margin:0;color:#6b7280;font-size:15.5px;}.pm__steps p+p{margin-top:10px;}.pm__table{width:100%;border-collapse:separate;border-spacing:0;margin:18px 0 28px;font-size:15px;background:#fff;border:1px solid #eceef1;border-radius:12px;overflow:hidden;box-shadow:0 1px 2px rgba(16,24,40,.04);}.pm__table th{text-align:left;background:#fafafa;font:700 11.5px Inter;letter-spacing:.05em;text-transform:uppercase;color:#9ca3af;padding:12px 16px;border-bottom:1px solid #eceef1;}.pm__table td{padding:14px 16px;border-bottom:1px solid #f3f4f6;color:#4b5563;vertical-align:top;}.pm__table tbody tr:last-child td{border-bottom:none;}.pm__table tbody tr:hover{background:#fbfcff;}.pm__promo{background:linear-gradient(180deg,#f0f5ff,#eef4ff);border:1px solid #dbe6ff;border-radius:18px;padding:34px;margin:36px 0;text-align:center;}.pm__promo h2{margin:0 0 10px;font-size:25px;}.pm__promo p{color:#4b5563;font-size:16px;max-width:520px;margin:0 auto 18px;}.pm__callout{background:#fff;border:1px solid #dbe6ff;border-left:4px solid #2563eb;border-radius:12px;padding:18px 22px;margin:24px 0;color:#4b5563;box-shadow:0 1px 2px rgba(16,24,40,.04);}.pm__callout p:last-child{margin-bottom:0;}.pm__inline-cta{margin:4px 0 22px;font-size:14.5px;}.pm__inline-cta a{color:#2563eb;font-weight:600;text-decoration:none;border-bottom:1.5px solid rgba(37,99,235,.3);padding-bottom:1px;}.pm__inline-cta a:hover{border-bottom-color:#2563eb;}.pm__btn{display:inline-block;background:#2563eb;color:#fff;font:600 15px Inter;padding:13px 26px;border-radius:10px;box-shadow:0 4px 14px rgba(37,99,235,.28);}.pm a.pm__btn{color:#fff;text-decoration:none;font-weight:600;}.pm__btn--lg{padding:16px 34px;font-size:16px;}.pm__next{background:#fff;border:1px solid #eceef1;border-radius:14px;box-shadow:0 1px 2px rgba(16,24,40,.04);padding:22px 28px;margin:36px 0 20px;}.pm__next h2{font:700 11.5px Inter;letter-spacing:.1em;text-transform:uppercase;color:#2563eb;margin:0 0 4px;}.pm__next ul{list-style:none;padding:0;margin:0;}.pm__next li{position:relative;margin:0;padding:12px 30px 12px 0;border-bottom:1px solid #f3f4f6;font-size:15px;line-height:1.5;color:#6b7280;}.pm__next li:last-child{border-bottom:none;padding-bottom:2px;}.pm__next li::after{content:\"\\203A\";position:absolute;right:6px;top:50%;margin-top:-12px;font:600 20px\/1 Inter;color:#c8d1de;transition:color .15s ease,transform .15s ease;}.pm__next li:hover::after{color:#2563eb;transform:translateX(3px);}.pm__next a{color:#2563eb;font-weight:600;}.pm__next a:hover{text-decoration:underline;}.pm__sources{background:#fff;border:1px solid #eceef1;border-radius:14px;padding:24px 28px;margin:36px 0;}.pm__sources h2{font:700 11.5px Inter;letter-spacing:.1em;text-transform:uppercase;color:#9ca3af;margin:0 0 12px;}.pm__sources ul{list-style:none;padding:0;margin:0;}.pm__sources li{font-size:14.5px;color:#6b7280;padding:9px 0;border-bottom:1px solid #f3f4f6;}.pm__sources li:last-child{border-bottom:none;}.pm__pull{background:#f8fafc;padding:54px 0;text-align:center;}.pm__pull blockquote{margin:0 auto;max-width:760px;padding:30px 24px;border-top:1px solid #dbe1ea;border-bottom:1px solid #dbe1ea;color:#111827;font:600 25px\/1.4 Inter;letter-spacing:-.02em;}.pm__pull cite{display:block;margin-top:18px;color:#9ca3af;font:500 13px Inter;font-style:normal;}.pm__faq{padding:54px 0;background:#f8fafc;}.pm__faq h2{font-size:26px;text-align:center;margin:0 0 24px;}.pm__faq details{background:#fff;border:1px solid #eceef1;border-radius:12px;margin-bottom:10px;box-shadow:0 1px 2px rgba(16,24,40,.04);}.pm__faq summary{cursor:pointer;list-style:none;padding:17px 20px;font-weight:600;color:#111827;}.pm__faq summary::-webkit-details-marker{display:none;}.pm__faq details>div{padding:0 20px 17px;color:#6b7280;font-size:15.5px;}.pm__faq details>div p{margin:0;}.pm__final{background:#0f1729;color:#cbd5e1;text-align:center;padding:76px 0;margin-top:20px;border-radius:24px 24px 0 0;}.pm__final .pm__eyebrow{background:rgba(37,99,235,.16);border:none;color:#93b4ff;box-shadow:none;}.pm__final h2{color:#fff;font-size:33px;margin:16px 0 12px;}.pm__final p{color:#94a3b8;max-width:520px;margin:0 auto 24px;}@media(max-width:600px){.pm__inner{padding:0 18px;}.pm__hero{padding:48px 0 8px;}.pm__hero h1{font-size:34px;}.pm__dek{font-size:17px;}.pm__dek-cta{font-size:14px;}.pm__meta{flex-wrap:wrap;justify-content:center;gap:8px 11px;}.pm h2{font-size:24px;}.pm__next h2{font-size:11.5px;}.pm__next{padding:20px 22px;}.pm__next li{font-size:14.5px;}.pm__sources h2{font-size:11.5px;}.pm__fig{padding:0 16px;}.pm__fig img{aspect-ratio:16\/10;}.pm__steps>li{padding:18px 0 18px 56px;background:transparent;box-shadow:none;}.pm__steps>li::before{left:0;}.pm__table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;font-size:13.5px;}.pm__table th,.pm__table td{padding:10px 14px;}.pm__tldr-cta{align-items:flex-start;}.pm__tldr-cta a{white-space:normal;}.pm__pull{padding:42px 0;}.pm__pull blockquote{font-size:21px;}.pm__faq{padding:44px 0;}.pm__final{padding:64px 0;}.pm__final h2{font-size:30px;}.pm__btn--lg{width:100%;text-align:center;}}<\/style>\n<style id=\"swcalc-style\">.swc{background:#fff;border:1px solid #dbe6ff;border-radius:18px;box-shadow:0 8px 30px rgba(16,24,40,.10);padding:26px 26px 20px;margin:34px auto 4px;max-width:720px;text-align:left;}.swc__kicker{display:inline-flex;align-items:center;gap:7px;font:700 11px Inter;letter-spacing:.09em;text-transform:uppercase;color:#2563eb;}.swc__kicker::before{content:\"\";width:6px;height:6px;border-radius:50%;background:#2563eb;}.swc__title{font:800 21px\/1.2 Inter;color:#111827;letter-spacing:-.02em;margin:7px 0 18px;}.swc__grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}.swc__field{margin:0 0 14px;}.swc__field label{display:block;font:600 12.5px Inter;color:#6b7280;margin-bottom:6px;}.swc input{width:100%;padding:12px 14px;border:1.5px solid #e5e7eb;border-radius:10px;font:600 16px Inter;color:#111827;background:#fbfcfe;outline:none;transition:border-color .15s ease,box-shadow .15s ease;appearance:textfield;-moz-appearance:textfield;}.swc input::-webkit-outer-spin-button,.swc input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0;}.swc input:focus{border-color:#2563eb;background:#fff;box-shadow:0 0 0 3px rgba(37,99,235,.12);}.swc input::placeholder{color:#c3c9d4;font-weight:500;}.swc__presets{display:flex;gap:8px;}.swc__preset{flex:1;padding:11px 0;border:1.5px solid #e5e7eb;border-radius:10px;background:#fff;font:600 14.5px Inter;color:#4b5563;cursor:pointer;transition:background .15s ease,border-color .15s ease,color .15s ease;}.swc__preset.is-on{background:#eff4ff;border-color:#2563eb;color:#2563eb;}.swc__custom{flex:1.1;min-width:118px;display:flex;align-items:center;gap:6px;border:1.5px solid #e5e7eb;border-radius:10px;background:#f9fafb;padding:0 10px;box-sizing:border-box;}.swc__custom span{font:600 12.5px Inter;color:#6b7280;white-space:nowrap;}.swc__custom input{border:0;background:transparent;width:100%;min-width:0;font:600 14.5px Inter;color:#111827;padding:11px 0;outline:none;}.swc__hint{display:block;font:500 11.5px Inter;color:#9ca3af;margin-top:5px;}.swc__out{background:linear-gradient(180deg,#f0f5ff,#eef4ff);border:1px solid #dbe6ff;border-radius:14px;padding:20px 22px 13px;margin-top:4px;}.swc__big{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;border-bottom:1px solid #dbe6ff;padding-bottom:14px;margin-bottom:4px;}.swc__num{font:800 44px\/1 Inter;color:#2563eb;letter-spacing:-.03em;font-variant-numeric:tabular-nums;transition:opacity .12s ease;}.swc__unit{font:600 15px Inter;color:#4b5563;}.swc__row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:10px 0;border-bottom:1px solid rgba(219,230,255,.75);font:500 14.5px Inter;color:#6b7280;}.swc__row b{color:#111827;font-weight:700;font-variant-numeric:tabular-nums;text-align:right;}.swc__row--cost{border-bottom:none;}.swc__row--cost b{color:#2563eb;font-size:17px;}.swc__note{font:500 12px\/1.55 Inter;color:#9ca3af;margin:6px 0 4px;}@media(max-width:600px){.swc{padding:20px 16px 14px;border-radius:16px;}.swc__grid{gap:10px;}.swc__num{font-size:38px;}.swc__preset{padding:12px 0;}.swc__presets{flex-wrap:wrap;}.swc__custom{flex:1 1 100%;}}<\/style>\n<p><script>\n(function(){\n  try{\n    var b=document.body;\n    if(b && b.classList){b.classList.add('single-post');}\n  }catch(e){}\n})();\n<\/script><\/p>\n<article class=\"pm\">\n<header class=\"pm__hero\">\n<div class=\"pm__inner\">\n<nav class=\"pm__crumb\">Blog &nbsp;&rsaquo;&nbsp; How to Estimate<\/nav>\n<p><span class=\"pm__eyebrow\">Contractor Calculator &middot; Roofing<\/span><\/p>\n<h1>Roof Pitch Calculator: Pitch, Angle, and Roof Area<\/h1>\n<p class=\"pm__dek\">Roof pitch is rise over a 12 in run. Set the rise below, or type a measured angle, and the pitch, multiplier, and true roof area update as you type.<\/p>\n<p class=\"pm__dek-cta\">Pricing the whole roof? <a href=\"https:\/\/swcostestimator.app.link\/ce-ai\" rel=\"noopener\" target=\"_blank\">Estimate it from a photo<\/a> in about six seconds.<\/p>\n<div class=\"pm__rating\"><span class=\"pm__stars\">&#9733;&#9733;&#9733;&#9733;&#9733;<\/span> <b>4.8<\/b> <span class=\"pm__rating-sub\">on the App Store<\/span><\/div>\n<div class=\"pm__meta\">\n<span>SimplyWise<\/span><br \/>\n<i><\/i><br \/>\n<span>Updated September 16, 2026<\/span><br \/>\n<i><\/i><br \/>\n<span>5 min read<\/span>\n<\/div>\n<div class=\"swc\" id=\"swcalc\">\n<span class=\"swc__kicker\">Free Roof Pitch Calculator<\/span><\/p>\n<div class=\"swc__title\">Set the pitch, get the angle and the real roof area<\/div>\n<div class=\"swc__field\"><label for=\"swc-rise\">Common pitch<\/label><\/p>\n<div class=\"swc__presets\" id=\"swc-presets\"><button type=\"button\" class=\"swc__preset\" data-r=\"4\">4:12<\/button><button type=\"button\" class=\"swc__preset is-on\" data-r=\"6\">6:12<\/button><button type=\"button\" class=\"swc__preset\" data-r=\"8\">8:12<\/button><button type=\"button\" class=\"swc__preset\" data-r=\"12\">12:12<\/button><\/div>\n<\/div>\n<div class=\"swc__grid\">\n<div class=\"swc__field\"><label for=\"swc-rise\">Rise (in)<\/label><input id=\"swc-rise\" type=\"number\" inputmode=\"decimal\" min=\"0\" max=\"240\" step=\"0.25\" value=\"6\"><\/div>\n<div class=\"swc__field\"><label for=\"swc-run\">Run (in)<\/label><input id=\"swc-run\" type=\"number\" inputmode=\"decimal\" min=\"0.25\" max=\"240\" step=\"1\" value=\"12\"><span class=\"swc__hint\">Leave at 12 for a standard pitch<\/span><\/div>\n<\/div>\n<div class=\"swc__grid\">\n<div class=\"swc__field\"><label for=\"swc-ang\">Measured angle (degrees)<\/label><input id=\"swc-ang\" type=\"number\" inputmode=\"decimal\" min=\"0.1\" max=\"89\" step=\"0.1\" placeholder=\"optional\"><span class=\"swc__hint\">Overrides rise and run<\/span><\/div>\n<div class=\"swc__field\"><label for=\"swc-area\">Roof plan area (sq ft)<\/label><input id=\"swc-area\" type=\"number\" inputmode=\"decimal\" min=\"1\" max=\"100000\" step=\"10\" value=\"1600\"><\/div>\n<\/div>\n<div class=\"swc__out\" aria-live=\"polite\">\n<div class=\"swc__big\"><span class=\"swc__num\" id=\"swc-pitch\">6<\/span><span class=\"swc__unit\">in 12 roof pitch<\/span><\/div>\n<div class=\"swc__row\"><span>Slope angle<\/span><b id=\"swc-angle\">26.6 degrees<\/b><\/div>\n<div class=\"swc__row\"><span>Pitch multiplier<\/span><b id=\"swc-mult\">1.118<\/b><\/div>\n<div class=\"swc__row swc__row--cost\"><span>Roof surface area<\/span><b id=\"swc-surface\">1,789 sq ft<\/b><\/div>\n<p class=\"swc__note\" id=\"swc-note\">Standard slope for asphalt shingles, single underlayment, per IRC R905.2.2. Code limits read September 11, 2026.<\/p>\n<\/div>\n<\/div>\n<p><script>\n(function(){\n  \/\/ Pitch, angle and the pitch multiplier are pure geometry, so they carry no\n  \/\/ source. The CODE LIMITS below are sourced data, one block, swap-ready:\n  \/\/ IRC R905.2.2 sets 2:12 as the minimum slope for asphalt shingles and\n  \/\/ requires double underlayment from 2:12 up to 4:12. Read 2026-09-11 from\n  \/\/ two free municipal publications of the code text: City of Seattle,\n  \/\/ 2012 Seattle Residential Code Chapter 9 (seattle.gov) and the Town of\n  \/\/ Windsor Locks CT building department asphalt shingle handout.\n  \/\/ Maker low slope limits agree: TAMKO Elite Glass-Seal data sheet\n  \/\/ (\"2 inches per foot or greater\"), IKO Cambridge technical data sheet\n  \/\/ (\"Never apply asphalt shingles to roof slopes less than 2:12\"),\n  \/\/ CertainTeed Landmark product data (\"slopes greater than 2 in per foot\"),\n  \/\/ all captured 2026-09-11.\n  var LOW_MIN=2, STD_MIN=4;\n  var NOTE_STD='Standard slope for asphalt shingles, single underlayment, per IRC R905.2.2. Code limits read September 11, 2026.';\n  var NOTE_LOW='Low slope. From 2 in 12 up to 4 in 12, IRC R905.2.2 requires double underlayment. Code limits read September 11, 2026.';\n  var NOTE_UNDER='Under the 2 in 12 floor for asphalt shingles in IRC R905.2.2. This roof needs a different covering, a membrane or a metal system. Code limits read September 11, 2026.';\n  function $(i){return document.getElementById(i);}\n  function r6(x){return Number(x.toFixed(6));}\n  function val(el,lo,hi){var v=parseFloat(el.value);if(!isFinite(v)||v<lo||v>hi){return null;}return v;}\n  function trim(s){if(s.indexOf('.')<0){return s;}return s.replace(\/0+$\/,'').replace(\/\\.$\/,'');}\n  function neutral(){\n    $('swc-pitch').textContent='0';\n    $('swc-angle').textContent='enter rise and run';\n    $('swc-mult').textContent='1.000';\n    $('swc-surface').textContent='0 sq ft';\n    $('swc-note').textContent='Enter a rise and a run to see the IRC R905.2.2 slope limits. Code limits read September 11, 2026.';\n  }\n  function run(){\n    var ang=val($('swc-ang'),0.1,89);\n    var ratio, deg;\n    if(ang!==null){\n      ratio=Math.tan(ang*Math.PI\/180);\n      deg=ang;\n    }else{\n      var rise=val($('swc-rise'),0,240), runIn=val($('swc-run'),0.25,240);\n      if(rise===null||runIn===null){neutral();return;}\n      ratio=rise\/runIn;\n      deg=Math.atan(ratio)*180\/Math.PI;\n    }\n    var pitch12=r6(ratio*12);\n    var mult=Math.sqrt(1+ratio*ratio);\n    var area=val($('swc-area'),1,100000);\n    $('swc-pitch').textContent=trim(pitch12.toFixed(2));\n    $('swc-angle').textContent=deg.toFixed(1)+' degrees';\n    $('swc-mult').textContent=mult.toFixed(3);\n    $('swc-surface').textContent=(area===null)?'enter plan area':Math.round(area*mult).toLocaleString('en-US')+' sq ft';\n    $('swc-note').textContent=(pitch12<LOW_MIN)?NOTE_UNDER:((pitch12<STD_MIN)?NOTE_LOW:NOTE_STD);\n  }\n  var pb=document.querySelectorAll('#swc-presets .swc__preset');\n  pb.forEach(function(b){b.addEventListener('click',function(){\n    $('swc-rise').value=b.getAttribute('data-r');\n    $('swc-run').value='12';\n    $('swc-ang').value='';\n    pb.forEach(function(x){x.classList.remove('is-on');});\n    b.classList.add('is-on');\n    run();\n  });});\n  ['swc-rise','swc-run','swc-ang'].forEach(function(i){$(i).addEventListener('input',function(){\n    pb.forEach(function(x){x.classList.remove('is-on');});\n    run();\n  });});\n  $('swc-area').addEventListener('input',run);\n  run();\n})();\n<\/script><\/p>\n<figure class=\"pm__fig\">\n<img decoding=\"async\" alt=\"Wooden roof framing standing against an open sky, the rise over run that sets a roof pitch\" loading=\"eager\" src=\"https:\/\/images.unsplash.com\/photo-1676802540678-2dceb1820113?w=1400&amp;h=700&amp;fit=crop&amp;q=80&amp;auto=format\"\/><br \/>\n<\/figure>\n<\/div>\n<\/header>\n<div class=\"pm__body\">\n<div class=\"pm__inner\">\n<aside class=\"pm__tldr\">\n<div class=\"pm__tldr-label\">At a glance<\/div>\n<ol>\n<li>Roof pitch is rise in 12. A roof climbing 6 in over 12 in of run is a 6:12.<\/li>\n<li>Slope angle is the arctangent of rise over run. A 6:12 is 26.6 degrees.<\/li>\n<li>The pitch multiplier is the square root of 1 plus the ratio squared. A 6:12 is 1.118.<\/li>\n<li>Plan area times the multiplier is the real surface you cover.<\/li>\n<li>IRC R905.2.2 sets 2:12 as the shingle floor, with double underlayment below 4:12.<\/li>\n<li>TAMKO, IKO, and CertainTeed publish the same 2:12 floor.<\/li>\n<\/ol>\n<div class=\"pm__tldr-cta\"><span>Turn the squares into a priced, branded quote. Free to try.<\/span><a href=\"https:\/\/swcostestimator.app.link\/ce-ai\" rel=\"noopener\" target=\"_blank\">SimplyWise Cost Estimator<\/a><\/div>\n<\/aside>\n<h2>How the roof pitch calculator works<\/h2>\n<p>Pitch is a ratio. Roofers write it as rise in 12, inches of climb for every 12 in of run. Level a square against a rafter, mark 12 in out, and measure straight up.<\/p>\n<p>Two numbers fall out of that ratio. Slope angle is the arctangent of rise over run in degrees. The pitch multiplier is the square root of 1 plus the ratio squared, the hypotenuse of the same triangle.<\/p>\n<p>The multiplier is the one that touches money. A plan draws the roof flat, so plan area is always smaller than the surface you cover.<\/p>\n<h2>Worked example: a 6:12 roof over a 1,600 sq ft footprint<\/h2>\n<p>A 6:12 climbs 6 in over 12 in of run, a ratio of 0.5. The arctangent of 0.5 is <strong>26.6 degrees<\/strong>.<\/p>\n<p>The multiplier is the square root of 1.25, or <strong>1.118<\/strong>. Multiply the 1,600 sq ft footprint by it and the roof surface is <strong>1,789 sq ft<\/strong>, about 189 sq ft more than the plan shows.<\/p>\n<p>Bid the plan area instead and you are short almost two squares of shingles, underlayment, and labor. On a 12:12 that footprint covers 2,263 sq ft.<\/p>\n<p class=\"pm__inline-cta\"><a href=\"https:\/\/swcostestimator.app.link\/ce-ai\" rel=\"noopener\" target=\"_blank\">SimplyWise Cost Estimator<\/a> turns a photo of the roof into an itemized estimate in about 6 seconds.<\/p>\n<h2>Pitch multiplier table<\/h2>\n<p>Geometry, so these never change. The last column applies the multiplier to a 1,600 sq ft footprint.<\/p>\n<table class=\"pm__table\">\n<thead>\n<tr>\n<th>Pitch<\/th>\n<th>Angle<\/th>\n<th>Multiplier<\/th>\n<th>Roof area on 1,600 sq ft<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>2:12<\/td>\n<td>9.5 degrees<\/td>\n<td>1.014<\/td>\n<td>1,622 sq ft<\/td>\n<\/tr>\n<tr>\n<td>4:12<\/td>\n<td>18.4 degrees<\/td>\n<td>1.054<\/td>\n<td>1,687 sq ft<\/td>\n<\/tr>\n<tr>\n<td>5:12<\/td>\n<td>22.6 degrees<\/td>\n<td>1.083<\/td>\n<td>1,733 sq ft<\/td>\n<\/tr>\n<tr>\n<td>6:12<\/td>\n<td>26.6 degrees<\/td>\n<td>1.118<\/td>\n<td>1,789 sq ft<\/td>\n<\/tr>\n<tr>\n<td>8:12<\/td>\n<td>33.7 degrees<\/td>\n<td>1.202<\/td>\n<td>1,923 sq ft<\/td>\n<\/tr>\n<tr>\n<td>9:12<\/td>\n<td>36.9 degrees<\/td>\n<td>1.250<\/td>\n<td>2,000 sq ft<\/td>\n<\/tr>\n<tr>\n<td>10:12<\/td>\n<td>39.8 degrees<\/td>\n<td>1.302<\/td>\n<td>2,083 sq ft<\/td>\n<\/tr>\n<tr>\n<td>12:12<\/td>\n<td>45.0 degrees<\/td>\n<td>1.414<\/td>\n<td>2,263 sq ft<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Where low slope starts, and what the code makes you do<\/h2>\n<p>IRC R905.2.2 is short and blunt. Asphalt shingles are allowed only on roof slopes of two units vertical in 12 units horizontal or greater. From 2:12 up to 4:12, double underlayment is required.<\/p>\n<p>The makers publish the same floor. TAMKO lists Elite Glass-Seal for decks with inclines of 2 in per foot or greater, and sends 2 in to under 4 in per foot to its low slope section. IKO prints it on the Cambridge sheet: never apply asphalt shingles to slopes less than 2:12. CertainTeed limits Landmark to slopes greater than 2 in per foot, with additional underlayment below 4:12.<\/p>\n<p>So 4:12 is where a shingle roof stops needing special treatment, and 2:12 is where shingles stop being legal. Below that you change coverings: a membrane, standing seam metal down to 1\/4:12, or lapped seam panels with sealant down to 1\/2:12.<\/p>\n<section class=\"pm__promo\">\n<h2>Turn the pitch into a priced roof<\/h2>\n<p>The calculator gives you the real surface area. SimplyWise Cost Estimator turns a photo into an itemized estimate in about 6 seconds. Pricing is $29.99\/mo or $239.99\/yr, about $20\/mo on annual, with a 7-day free trial.<\/p>\n<p><a class=\"pm__btn\" href=\"https:\/\/swcostestimator.app.link\/ce-ai\" rel=\"noopener\" target=\"_blank\">SimplyWise Cost Estimator<\/a><br \/>\n<\/section>\n<h2>Minimum pitch by roof covering<\/h2>\n<p>Chapter 9 sets a floor for every covering, not just shingles.<\/p>\n<table class=\"pm__table\">\n<thead>\n<tr>\n<th>Covering<\/th>\n<th>Minimum slope<\/th>\n<th>Section<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Asphalt shingles<\/td>\n<td>2:12, double underlayment below 4:12<\/td>\n<td>R905.2.2<\/td>\n<\/tr>\n<tr>\n<td>Clay and concrete tile<\/td>\n<td>2.5:12, double underlayment below 4:12<\/td>\n<td>R905.3.2<\/td>\n<\/tr>\n<tr>\n<td>Metal roof shingles<\/td>\n<td>3:12<\/td>\n<td>R905.4.2<\/td>\n<\/tr>\n<tr>\n<td>Wood shingles and shakes<\/td>\n<td>3:12<\/td>\n<td>R905.7.2, R905.8.2<\/td>\n<\/tr>\n<tr>\n<td>Lapped seam metal panels<\/td>\n<td>3:12, or 1\/2:12 with lap sealant<\/td>\n<td>R905.10.2<\/td>\n<\/tr>\n<tr>\n<td>Standing seam metal<\/td>\n<td>1\/4:12<\/td>\n<td>R905.10.2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Measure the pitch without guessing<\/h2>\n<ol class=\"pm__steps\">\n<li>\n<h3>Work off a level, not your eye<\/h3>\n<p>Hold a 24 in level on the shingles, center the bubble, mark 12 in from the roof end, and measure straight down. That drop is the rise.<\/p>\n<\/li>\n<li>\n<h3>Measure a rafter instead if the roof is steep<\/h3>\n<p>From the attic, measure rafter rise and horizontal run to the ridge. Any pair works, and the calculator scales it back to a 12 in run.<\/p>\n<\/li>\n<li>\n<h3>Check every plane separately<\/h3>\n<p>Additions, dormers, and porches rarely share the main pitch. Run the calculator per plane and add the areas, because one multiplier across a mixed roof understates the steep half.<\/p>\n<\/li>\n<li>\n<h3>Convert to squares before you price<\/h3>\n<p>Roofers buy in squares of 100 sq ft. Divide surface area by 100, then add waste. The 1,789 sq ft example is 17.89 squares before cuts.<\/p>\n<\/li>\n<\/ol>\n<div class=\"pm__next\">\n<h2>Keep reading<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.simplywise.com\/blog\/construction-calculators\/\">Construction Calculators Hub<\/a><\/li>\n<li><a href=\"https:\/\/www.simplywise.com\/blog\/roof-replacement-cost\/\">Roof Replacement Cost<\/a><\/li>\n<li><a href=\"https:\/\/www.simplywise.com\/blog\/gutter-replacement-cost\/\">Gutter Replacement Cost<\/a><\/li>\n<li><a href=\"https:\/\/www.simplywise.com\/blog\/drywall-sheet-and-mud-calculator\/\">Drywall Sheet and Mud Calculator<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"pm__sources\">\n<h2>Sources<\/h2>\n<h3>Code limits<\/h3>\n<ul>\n<li><a href=\"https:\/\/www.seattle.gov\/documents\/Departments\/SDCI\/Codes\/SeattleResidentialCode\/2012SRCChapter9.pdf\" rel=\"noopener\" target=\"_blank\">City of Seattle, Residential Code Chapter 9, Roof Assemblies<\/a> (R905.2.2 plus the R905.3.2 through R905.10.2 minimums; verified 2026-09-11).<\/li>\n<li><a href=\"https:\/\/cdn.townweb.com\/windsorlocksct.org\/wp-content\/uploads\/2024\/01\/Ashpalt_Shingle_Installation.pdf\" rel=\"noopener\" target=\"_blank\">Town of Windsor Locks CT, Asphalt Shingle Installation handout<\/a> (R905.2.2, 2:12 floor, double underlayment to 4:12; verified 2026-09-11).<\/li>\n<\/ul>\n<h3>Shingle maker data sheets<\/h3>\n<ul>\n<li><a href=\"https:\/\/www.tamko.com\/docs\/default-source\/data-sheets\/TAMKO-3-tab-elite-glass-seal-data-sheet-(joplin).pdf?sfvrsn=a30256a0_29\" rel=\"noopener\" target=\"_blank\">TAMKO, Elite Glass-Seal data sheet<\/a> (inclines of 2 in per foot or greater; low slope from 2 in to under 4 in; verified 2026-09-11).<\/li>\n<li><a href=\"https:\/\/www.iko.com\/na\/wp-content\/uploads\/2024\/12\/4220XXX_IKO_TDS_Cambridge_EN.pdf\" rel=\"noopener\" target=\"_blank\">IKO, Cambridge technical data sheet<\/a> (never apply asphalt shingles to slopes less than 2:12; verified 2026-09-11).<\/li>\n<li><a href=\"https:\/\/www.buildsite.com\/pdf\/certainteed\/Landmark-Shingles-Product-Data-2899919.pdf\" rel=\"noopener\" target=\"_blank\">CertainTeed, Landmark product data<\/a> (slopes greater than 2 in per foot; additional underlayment below 4:12; verified 2026-09-11).<\/li>\n<\/ul>\n<h3>Product<\/h3>\n<ul>\n<li><a href=\"https:\/\/apps.apple.com\/us\/app\/simplywise-cost-estimator\/id6670619664\" rel=\"noopener\" target=\"_blank\">SimplyWise Cost Estimator, App Store<\/a> (4.8 rating; verified 2026-09-09).<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<section class=\"pm__faq\">\n<div class=\"pm__inner\">\n<h2>Common questions about roof pitch<\/h2>\n<h3>Pitch, angle, and area<\/h3>\n<details>\n<summary>What is a 6:12 roof pitch in degrees?<\/summary>\n<div>\n<p>26.6 degrees. Divide the 6 in rise by the 12 in run for 0.5, then take the arctangent in degrees.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>How do I find the pitch multiplier?<\/summary>\n<div>\n<p>Take the square root of 1 plus the rise divided by run, squared. A 4:12 is 1.054, a 6:12 is 1.118, and a 12:12 is 1.414.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>How do I get roof area from the footprint?<\/summary>\n<div>\n<p>Multiply plan area by the pitch multiplier. A 1,600 sq ft footprint under a 6:12 covers 1,789 sq ft of roof.<\/p>\n<\/div>\n<\/details>\n<h3>Pitch limits and roofing over them<\/h3>\n<details>\n<summary>What is the minimum pitch for asphalt shingles?<\/summary>\n<div>\n<p>2:12. IRC R905.2.2 allows asphalt shingles only on slopes of 2:12 or greater, and TAMKO, IKO, and CertainTeed publish the same floor.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>When does a roof need double underlayment?<\/summary>\n<div>\n<p>From 2:12 up to 4:12. R905.2.2 calls that range low slope and requires two layers of underlayment under the shingles.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>Can SimplyWise price a roof from a photo?<\/summary>\n<div>\n<p>Yes. SimplyWise Cost Estimator turns a photo into an itemized estimate in about 6 seconds, with material and labor lines. Free to try, at $29.99\/mo or $239.99\/yr.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<\/section>\n<section class=\"pm__final\">\n<div class=\"pm__inner\">\n<span class=\"pm__eyebrow\">Measure once, bid once<\/span><\/p>\n<h2>Turn the pitch into a signed roofing quote.<\/h2>\n<p>Snap a photo and get an itemized estimate in about 6 seconds. Free to try.<\/p>\n<p><a class=\"pm__btn pm__btn--lg\" href=\"https:\/\/swcostestimator.app.link\/ce-ai\" rel=\"noopener\" target=\"_blank\">SimplyWise Cost Estimator<\/a>\n<\/div>\n<\/section>\n<\/article>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"BlogPosting\",\n  \"headline\": \"Roof Pitch Calculator: Pitch, Angle, and Roof Area\",\n  \"description\": \"A roof pitch calculator that turns rise over a 12 in run, a measured rise and run, or an angle into pitch, slope angle, the pitch multiplier, and true roof area.\",\n  \"author\": {\n    \"@type\": \"Organization\",\n    \"name\": \"SimplyWise\"\n  },\n  \"publisher\": {\n    \"@type\": \"Organization\",\n    \"name\": \"SimplyWise\",\n    \"logo\": {\n      \"@type\": \"ImageObject\",\n      \"url\": \"https:\/\/www.simplywise.com\/icon-512x512.png\"\n    }\n  },\n  \"datePublished\": \"2026-09-16\",\n  \"dateModified\": \"2026-09-16\",\n  \"mainEntityOfPage\": {\n    \"@type\": \"WebPage\",\n    \"@id\": \"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/\"\n  },\n  \"url\": \"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/\",\n  \"image\": [\n    \"https:\/\/images.unsplash.com\/photo-1676802540678-2dceb1820113?w=1400&h=700&fit=crop&q=80&auto=format\"\n  ]\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"HowTo\",\n  \"name\": \"How to Calculate Roof Pitch, Slope Angle, and Roof Area\",\n  \"step\": [\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 1,\n      \"name\": \"Work off a level, not your eye\",\n      \"text\": \"Hold a 24 inch level against a rafter or on the shingles, bring the bubble to center, mark 12 inches from the roof end, and measure straight down to the surface. That drop is the rise over a 12 inch run.\"\n    },\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 2,\n      \"name\": \"Measure a rafter instead if the roof is steep\",\n      \"text\": \"From inside the attic, measure the rafter rise and the horizontal run to the ridge. Any rise and run pair works, because the ratio scales back to a 12 inch run.\"\n    },\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 3,\n      \"name\": \"Check every roof plane separately\",\n      \"text\": \"Additions, dormers, and porches rarely share the main pitch. Calculate each plane on its own multiplier and add the surface areas together.\"\n    },\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 4,\n      \"name\": \"Convert the surface area to squares\",\n      \"text\": \"Multiply the roof plan area by the pitch multiplier for true surface area, divide by 100 for roofing squares, then add a waste allowance before pricing material.\"\n    }\n  ]\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is a 6:12 roof pitch in degrees?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"26.6 degrees. Divide the 6 in rise by the 12 in run for 0.5, then take the arctangent in degrees.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I find the pitch multiplier?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Take the square root of 1 plus the rise divided by run, squared. A 4:12 is 1.054, a 6:12 is 1.118, and a 12:12 is 1.414.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I get roof area from the footprint?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Multiply plan area by the pitch multiplier. A 1,600 sq ft footprint under a 6:12 covers 1,789 sq ft of roof.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the minimum pitch for asphalt shingles?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"2:12. IRC R905.2.2 allows asphalt shingles only on slopes of 2:12 or greater, and TAMKO, IKO, and CertainTeed publish the same floor.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"When does a roof need double underlayment?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"From 2:12 up to 4:12. R905.2.2 calls that range low slope and requires two layers of underlayment under the shingles.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can SimplyWise price a roof from a photo?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. SimplyWise Cost Estimator turns a photo into an itemized estimate in about 6 seconds, with material and labor lines. Free to try, at $29.99\/mo or $239.99\/yr.\"\n      }\n    }\n  ]\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"BreadcrumbList\",\n  \"itemListElement\": [\n    {\n      \"@type\": \"ListItem\",\n      \"position\": 1,\n      \"name\": \"Home\",\n      \"item\": \"https:\/\/www.simplywise.com\/\"\n    },\n    {\n      \"@type\": \"ListItem\",\n      \"position\": 2,\n      \"name\": \"Blog\",\n      \"item\": \"https:\/\/www.simplywise.com\/blog\/\"\n    },\n    {\n      \"@type\": \"ListItem\",\n      \"position\": 3,\n      \"name\": \"How to Estimate\",\n      \"item\": \"https:\/\/www.simplywise.com\/blog\/category\/how-to-estimate\/\"\n    },\n    {\n      \"@type\": \"ListItem\",\n      \"position\": 4,\n      \"name\": \"Roof Pitch Calculator: Pitch, Angle, and Roof Area\",\n      \"item\": \"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/\"\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Blog &nbsp;&rsaquo;&nbsp; How to Estimate Contractor Calculator &middot; Roofing Roof Pitch Calculator: Pitch, Angle, and Roof Area Roof pitch is rise over a 12 in run. Set the rise below, or type a measured angle, and the pitch, multiplier, and true roof area update as you type. Pricing the whole roof? Estimate it from a [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"roof pitch calculator","_yoast_wpseo_title":"Roof Pitch Calculator: Pitch, Angle, and Roof Area","_yoast_wpseo_metadesc":"A roof pitch calculator that turns rise over a 12 in run, a measured rise and run, or an angle into pitch, slope angle, the pitch multiplier, and true roof area.","_yoast_wpseo_linkdex":"71","_yoast_wpseo_content_score":"90","_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_canonical":"","inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-9454","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Roof Pitch Calculator: Pitch, Angle, and Roof Area<\/title>\n<meta name=\"description\" content=\"A roof pitch calculator that turns rise over a 12 in run, a measured rise and run, or an angle into pitch, slope angle, the pitch multiplier, and true roof area.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Roof Pitch Calculator: Pitch, Angle, and Roof Area\" \/>\n<meta property=\"og:description\" content=\"A roof pitch calculator that turns rise over a 12 in run, a measured rise and run, or an angle into pitch, slope angle, the pitch multiplier, and true roof area.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/\" \/>\n<meta property=\"og:site_name\" content=\"SimplyWise Cost Estimator\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-16T09:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-16T20:27:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/images.unsplash.com\/photo-1676802540678-2dceb1820113?w=1400&amp;h=700&amp;fit=crop&amp;q=80&amp;auto=format\" \/>\n<meta name=\"author\" content=\"Daniel Chinchilla\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Daniel Chinchilla\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/\"},\"author\":{\"name\":\"Daniel Chinchilla\",\"@id\":\"https:\/\/www.simplywise.com\/blog\/#\/schema\/person\/c6b02975b13398fa4764650c8d5610ac\"},\"headline\":\"Roof Pitch Calculator\",\"datePublished\":\"2026-09-16T09:00:00+00:00\",\"dateModified\":\"2026-09-16T20:27:08+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/\"},\"wordCount\":1172,\"publisher\":{\"@id\":\"https:\/\/www.simplywise.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/\",\"url\":\"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/\",\"name\":\"Roof Pitch Calculator: Pitch, Angle, and Roof Area\",\"isPartOf\":{\"@id\":\"https:\/\/www.simplywise.com\/blog\/#website\"},\"datePublished\":\"2026-09-16T09:00:00+00:00\",\"dateModified\":\"2026-09-16T20:27:08+00:00\",\"description\":\"A roof pitch calculator that turns rise over a 12 in run, a measured rise and run, or an angle into pitch, slope angle, the pitch multiplier, and true roof area.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.simplywise.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Roof Pitch Calculator\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.simplywise.com\/blog\/#website\",\"url\":\"https:\/\/www.simplywise.com\/blog\/\",\"name\":\"SimplyWise Cost Estimator\",\"description\":\"Blog\",\"publisher\":{\"@id\":\"https:\/\/www.simplywise.com\/blog\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.simplywise.com\/blog\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.simplywise.com\/blog\/#organization\",\"name\":\"SimplyWise Cost Estimator\",\"url\":\"https:\/\/www.simplywise.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.simplywise.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.simplywise.com\/blog\/wp-content\/uploads\/2026\/08\/simplywise-logo-512x512-1.png\",\"contentUrl\":\"https:\/\/www.simplywise.com\/blog\/wp-content\/uploads\/2026\/08\/simplywise-logo-512x512-1.png\",\"width\":512,\"height\":512,\"caption\":\"SimplyWise Cost Estimator\"},\"image\":{\"@id\":\"https:\/\/www.simplywise.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.crunchbase.com\/organization\/simplywise\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.simplywise.com\/blog\/#\/schema\/person\/c6b02975b13398fa4764650c8d5610ac\",\"name\":\"Daniel Chinchilla\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.simplywise.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/1b1ee77005dde5ba597d7ae9e0e68fa11a123fd406740e5e70c7c1ed738d177f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/1b1ee77005dde5ba597d7ae9e0e68fa11a123fd406740e5e70c7c1ed738d177f?s=96&d=mm&r=g\",\"caption\":\"Daniel Chinchilla\"},\"url\":\"https:\/\/www.simplywise.com\/blog\/author\/daniel\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Roof Pitch Calculator: Pitch, Angle, and Roof Area","description":"A roof pitch calculator that turns rise over a 12 in run, a measured rise and run, or an angle into pitch, slope angle, the pitch multiplier, and true roof area.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/","og_locale":"en_US","og_type":"article","og_title":"Roof Pitch Calculator: Pitch, Angle, and Roof Area","og_description":"A roof pitch calculator that turns rise over a 12 in run, a measured rise and run, or an angle into pitch, slope angle, the pitch multiplier, and true roof area.","og_url":"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/","og_site_name":"SimplyWise Cost Estimator","article_published_time":"2026-09-16T09:00:00+00:00","article_modified_time":"2026-09-16T20:27:08+00:00","og_image":[{"url":"https:\/\/images.unsplash.com\/photo-1676802540678-2dceb1820113?w=1400&amp;h=700&amp;fit=crop&amp;q=80&amp;auto=format"}],"author":"Daniel Chinchilla","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Daniel Chinchilla","Est. reading time":"6 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/#article","isPartOf":{"@id":"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/"},"author":{"name":"Daniel Chinchilla","@id":"https:\/\/www.simplywise.com\/blog\/#\/schema\/person\/c6b02975b13398fa4764650c8d5610ac"},"headline":"Roof Pitch Calculator","datePublished":"2026-09-16T09:00:00+00:00","dateModified":"2026-09-16T20:27:08+00:00","mainEntityOfPage":{"@id":"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/"},"wordCount":1172,"publisher":{"@id":"https:\/\/www.simplywise.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/","url":"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/","name":"Roof Pitch Calculator: Pitch, Angle, and Roof Area","isPartOf":{"@id":"https:\/\/www.simplywise.com\/blog\/#website"},"datePublished":"2026-09-16T09:00:00+00:00","dateModified":"2026-09-16T20:27:08+00:00","description":"A roof pitch calculator that turns rise over a 12 in run, a measured rise and run, or an angle into pitch, slope angle, the pitch multiplier, and true roof area.","breadcrumb":{"@id":"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.simplywise.com\/blog\/roof-pitch-calculator\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.simplywise.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Roof Pitch Calculator"}]},{"@type":"WebSite","@id":"https:\/\/www.simplywise.com\/blog\/#website","url":"https:\/\/www.simplywise.com\/blog\/","name":"SimplyWise Cost Estimator","description":"Blog","publisher":{"@id":"https:\/\/www.simplywise.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.simplywise.com\/blog\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.simplywise.com\/blog\/#organization","name":"SimplyWise Cost Estimator","url":"https:\/\/www.simplywise.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.simplywise.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.simplywise.com\/blog\/wp-content\/uploads\/2026\/08\/simplywise-logo-512x512-1.png","contentUrl":"https:\/\/www.simplywise.com\/blog\/wp-content\/uploads\/2026\/08\/simplywise-logo-512x512-1.png","width":512,"height":512,"caption":"SimplyWise Cost Estimator"},"image":{"@id":"https:\/\/www.simplywise.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.crunchbase.com\/organization\/simplywise"]},{"@type":"Person","@id":"https:\/\/www.simplywise.com\/blog\/#\/schema\/person\/c6b02975b13398fa4764650c8d5610ac","name":"Daniel Chinchilla","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.simplywise.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/1b1ee77005dde5ba597d7ae9e0e68fa11a123fd406740e5e70c7c1ed738d177f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/1b1ee77005dde5ba597d7ae9e0e68fa11a123fd406740e5e70c7c1ed738d177f?s=96&d=mm&r=g","caption":"Daniel Chinchilla"},"url":"https:\/\/www.simplywise.com\/blog\/author\/daniel\/"}]}},"_links":{"self":[{"href":"https:\/\/www.simplywise.com\/blog\/wp-json\/wp\/v2\/posts\/9454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.simplywise.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.simplywise.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.simplywise.com\/blog\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.simplywise.com\/blog\/wp-json\/wp\/v2\/comments?post=9454"}],"version-history":[{"count":2,"href":"https:\/\/www.simplywise.com\/blog\/wp-json\/wp\/v2\/posts\/9454\/revisions"}],"predecessor-version":[{"id":9466,"href":"https:\/\/www.simplywise.com\/blog\/wp-json\/wp\/v2\/posts\/9454\/revisions\/9466"}],"wp:attachment":[{"href":"https:\/\/www.simplywise.com\/blog\/wp-json\/wp\/v2\/media?parent=9454"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.simplywise.com\/blog\/wp-json\/wp\/v2\/categories?post=9454"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.simplywise.com\/blog\/wp-json\/wp\/v2\/tags?post=9454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}