{"id":8888,"date":"2026-09-07T09:00:00","date_gmt":"2026-09-07T09:00:00","guid":{"rendered":"https:\/\/www.simplywise.com\/blog\/?p=8888"},"modified":"2026-09-07T16:22:25","modified_gmt":"2026-09-07T16:22:25","slug":"concrete-slab-cost-calculator","status":"publish","type":"post","link":"https:\/\/www.simplywise.com\/blog\/concrete-slab-cost-calculator\/","title":{"rendered":"Concrete Slab Cost Calculator: Yards, Bags, and Price"},"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 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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; Concrete<\/span><\/p>\n<h1>Concrete Slab Cost Calculator: Yards, Bags, and Price<\/h1>\n<p class=\"pm__dek\">Concrete is sold by the cubic yard, so concrete slab cost is a volume question. Set the slab below; yards, bags, and dollars update as you type.<\/p>\n<p class=\"pm__dek-cta\">Pricing the whole job? <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 7, 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 Slab Calculator<\/span><\/p>\n<div class=\"swc__title\">Size the pour, see the price<\/div>\n<div class=\"swc__grid\">\n<div class=\"swc__field\"><label for=\"swc-len\">Length (ft)<\/label><input id=\"swc-len\" type=\"number\" inputmode=\"decimal\" min=\"1\" max=\"500\" step=\"1\" value=\"12\"><\/div>\n<div class=\"swc__field\"><label for=\"swc-wid\">Width (ft)<\/label><input id=\"swc-wid\" type=\"number\" inputmode=\"decimal\" min=\"1\" max=\"500\" step=\"1\" value=\"12\"><\/div>\n<\/div>\n<div class=\"swc__field\"><label for=\"swc-thk\">Thickness<\/label><\/p>\n<div class=\"swc__presets\" id=\"swc-presets\"><button type=\"button\" class=\"swc__preset is-on\" data-t=\"4\">4 in<\/button><button type=\"button\" class=\"swc__preset\" data-t=\"5\">5 in<\/button><button type=\"button\" class=\"swc__preset\" data-t=\"6\">6 in<\/button><label class=\"swc__custom\" for=\"swc-thk\"><span>Custom<\/span><input id=\"swc-thk\" type=\"number\" inputmode=\"decimal\" min=\"1\" max=\"24\" step=\"0.5\" value=\"4\" aria-label=\"Thickness in inches\"><\/label><\/div>\n<\/div>\n<div class=\"swc__grid\">\n<div class=\"swc__field\"><label for=\"swc-waste\">Extra for waste (%)<\/label><input id=\"swc-waste\" type=\"number\" inputmode=\"decimal\" min=\"0\" max=\"25\" step=\"1\" value=\"10\"><span class=\"swc__hint\">NRMCA CIP 31: order 4% to 10% over plan<\/span><\/div>\n<div class=\"swc__field\"><label for=\"swc-price\">Local quote ($\/cu yd)<\/label><input id=\"swc-price\" type=\"number\" inputmode=\"decimal\" min=\"50\" max=\"500\" step=\"1\" placeholder=\"optional\"><\/div>\n<\/div>\n<div class=\"swc__out\" aria-live=\"polite\">\n<div class=\"swc__big\"><span class=\"swc__num\" id=\"swc-order\">2.00<\/span><span class=\"swc__unit\">cubic yards to order<\/span><\/div>\n<div class=\"swc__row\"><span>Slab volume<\/span><b id=\"swc-vol\">1.78 cu yd<\/b><\/div>\n<div class=\"swc__row\"><span>Bags instead<\/span><b id=\"swc-bags\">88 bags of 80 lb mix<\/b><\/div>\n<div class=\"swc__row swc__row--cost\"><span>Material cost<\/span><b id=\"swc-cost\">$320 to $360<\/b><\/div>\n<p class=\"swc__note\" id=\"swc-note\">Published range, updated Aug 27, 2026, from published averages of $160 to $180 per cubic yard. Local prices vary.<\/p>\n<\/div>\n<\/div>\n<p><script>\n(function(){\n  \/\/ Price anchors are SOURCED DATA, one block, swap-ready for per-state feeds.\n  \/\/ low 160: NRMCA average 2023 selling price $160\/cu yd (Performance Benchmarking\n  \/\/          Survey + State of the Industry PDF, nrmca.org, captured 2026-08-27).\n  \/\/ high 180: Concrete Financial Insights 2025 producer index $179.95, rounded\n  \/\/          (concretefinancialinsights.com\/us-concrete-industry-data, 2026-08-27).\n  \/\/ yields (two independent publishers, exact agreement): 0.60 cu ft per 80 lb\n  \/\/          bag, 0.45 per 60 lb. QUIKRETE Concrete Mix data sheet 1101\n  \/\/          (quikrete.com) AND Sakrete High-Strength Concrete Mix PDP\n  \/\/          (sakrete.com\/product\/high-strength-concrete-mix, \"Yields 0.30 ft3\n  \/\/          (40 lb); 0.45 ft3 (60 lb); 0.6 ft3 (80 lb)\"), both captured\n  \/\/          2026-08-27.\n  var P_LOW=160, P_HIGH=180;\n  var NOTE_NATL='Published range, updated Aug 27, 2026, from published averages of $160 to $180 per cubic yard. Local prices vary.';\n  var Y80=0.60, Y60=0.45;\n  function $(i){return document.getElementById(i);}\n  function ceil6(x){return Math.ceil(Number(x.toFixed(6)));}\n  function val(el,lo,hi){var v=parseFloat(el.value);if(!isFinite(v)||v<lo||v>hi){return null;}return v;}\n  function money(n){return '$'+Math.round(n).toLocaleString('en-US');}\n  function run(){\n    var L=val($('swc-len'),0.1,500),W=val($('swc-wid'),0.1,500),T=val($('swc-thk'),0.5,24);\n    var waste=val($('swc-waste'),0,25);if(waste===null){waste=0;}\n    var quote=val($('swc-price'),1,2000);\n    if(L===null||W===null||T===null){\n      $('swc-order').textContent='0.00';\n      $('swc-vol').textContent='enter slab size';\n      $('swc-bags').textContent='0 bags';\n      $('swc-cost').textContent='$0';\n      $('swc-note').textContent=NOTE_NATL;\n      return;\n    }\n    var cuft=L*W*(T\/12);\n    var yd=cuft\/27;\n    var withWaste=yd*(1+waste\/100);\n    var order=ceil6(withWaste*4)\/4;\n    var bags80=ceil6(cuft*(1+waste\/100)\/Y80);\n    $('swc-order').textContent=order.toFixed(2);\n    $('swc-vol').textContent=yd.toFixed(2)+' cu yd';\n    $('swc-bags').textContent=bags80.toLocaleString('en-US')+' bags of 80 lb mix';\n    if(quote!==null){\n      $('swc-cost').textContent=money(order*quote);\n      $('swc-note').textContent='At your quoted '+money(quote)+' per cubic yard, materials only. Delivery minimums and fees vary.';\n    }else{\n      $('swc-cost').textContent=money(order*P_LOW)+' to '+money(order*P_HIGH);\n      $('swc-note').textContent=NOTE_NATL;\n    }\n  }\n  ['swc-len','swc-wid','swc-thk','swc-waste','swc-price'].forEach(function(i){$(i).addEventListener('input',run);});\n  var pb=document.querySelectorAll('#swc-presets .swc__preset');\n  pb.forEach(function(b){b.addEventListener('click',function(){\n    $('swc-thk').value=b.getAttribute('data-t');\n    pb.forEach(function(x){x.classList.remove('is-on');});\n    b.classList.add('is-on');\n    run();\n  });});\n  $('swc-thk').addEventListener('input',function(){pb.forEach(function(x){x.classList.remove('is-on');});});\n  run();\n})();\n<\/script><\/p>\n<figure class=\"pm__fig\">\n<img decoding=\"async\" alt=\"Crew screeding fresh concrete over a rebar mat, the work behind any concrete slab cost estimate\" loading=\"eager\" src=\"https:\/\/images.unsplash.com\/photo-1743130940796-7a8e6e8b998e?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>Length times width times thickness in feet, divided by 27, gives cubic yards.<\/li>\n<li>Order 4% to 10% over plan, per NRMCA CIP 31. The default here is 10%.<\/li>\n<li>Ready mix averaged $160 per cubic yard in 2023 per NRMCA. A large-producer index puts 2025 near $180.<\/li>\n<li>An 80 lb bag yields 0.60 cu ft, so a full cubic yard is 45 bags.<\/li>\n<li>A 12 by 12 slab at 4 in is 2 yards ordered, $320 to $360 in concrete.<\/li>\n<li>The range is national. Two local plant quotes settle the real price.<\/li>\n<\/ol>\n<div class=\"pm__tldr-cta\"><span>Price the pour, the base, and the labor from a photo, 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 concrete slab cost calculator works<\/h2>\n<p>The math is three moves. Multiply length by width by thickness in feet for cubic feet. Divide by 27 for cubic yards. Multiply by the price per yard.<\/p>\n<p>Thickness trips people because it is measured in inches. Divide by 12 first. A 4 in slab is 0.333 ft, so each square foot of slab is a third of a cubic foot.<\/p>\n<p>The calculator adds waste and rounds the order up to the next quarter yard. NRMCA CIP 31 says to order 4% to 10% over the plan quantity for spillage, uneven subgrade, and over-excavation. Coming up short means a second delivery and a cold joint.<\/p>\n<h2>Worked example: a 12 by 12 patio at 4 inches<\/h2>\n<p>Area is 144 sq ft. At 0.333 ft thick that is 48 cu ft, or <strong>1.78 cubic yards<\/strong>. Add 10% waste for 1.96, round up, and order <strong>2 cubic yards<\/strong>.<\/p>\n<p>At the published national averages of $160 to $180 per cubic yard, the concrete runs <strong>$320 to $360<\/strong>. That is material only; base, forms, reinforcement, labor, and finishing are separate lines.<\/p>\n<p class=\"pm__inline-cta\"><a href=\"https:\/\/swcostestimator.app.link\/ce-ai\" rel=\"noopener\" target=\"_blank\">SimplyWise Cost Estimator<\/a> prices all of those lines from a photo in about 6 seconds.<\/p>\n<h2>Common slab sizes at a glance<\/h2>\n<p>All rows: 4 in thick, 10% waste, order rounded up to the quarter yard, national material range.<\/p>\n<table class=\"pm__table\">\n<thead>\n<tr>\n<th>Slab<\/th>\n<th>Volume<\/th>\n<th>Order<\/th>\n<th>80 lb bags<\/th>\n<th>Material cost<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>10 by 10<\/td>\n<td>1.23 cu yd<\/td>\n<td>1.50 cu yd<\/td>\n<td>62<\/td>\n<td>$240 to $270<\/td>\n<\/tr>\n<tr>\n<td>12 by 12<\/td>\n<td>1.78 cu yd<\/td>\n<td>2.00 cu yd<\/td>\n<td>88<\/td>\n<td>$320 to $360<\/td>\n<\/tr>\n<tr>\n<td>16 by 20<\/td>\n<td>3.95 cu yd<\/td>\n<td>4.50 cu yd<\/td>\n<td>196<\/td>\n<td>$720 to $810<\/td>\n<\/tr>\n<tr>\n<td>20 by 20<\/td>\n<td>4.94 cu yd<\/td>\n<td>5.50 cu yd<\/td>\n<td>245<\/td>\n<td>$880 to $990<\/td>\n<\/tr>\n<tr>\n<td>24 by 24<\/td>\n<td>7.11 cu yd<\/td>\n<td>8.00 cu yd<\/td>\n<td>352<\/td>\n<td>$1,280 to $1,440<\/td>\n<\/tr>\n<tr>\n<td>30 by 30<\/td>\n<td>11.11 cu yd<\/td>\n<td>12.25 cu yd<\/td>\n<td>550<\/td>\n<td>$1,960 to $2,205<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>At 6 in, common for garages, every number rises by half again. The 24 by 24 order becomes 11.75 yards instead of 8.<\/p>\n<h2>What drives the price per yard<\/h2>\n<p>NRMCA put the average 2023 selling price at <strong>$160 per cubic yard<\/strong>, on 400 million cubic yards delivered. Producers in its benchmarking survey ranged from about $150 to $171 per yard, so identical mixes price differently plant to plant.<\/p>\n<p>Prices have climbed. An index of four large public producers rose from $113 per yard in 2016 to <strong>$180 in 2025<\/strong>, skewing commercial. Those two anchors, $160 and $180, are the range this page uses.<\/p>\n<p>What moves a local quote: mix strength, distance, and load size. Mixers carry 8 to 12 cubic yards per CIP 31, and it warns against ordering small cleanup loads. Quote the yard locally; the volume math holds.<\/p>\n<section class=\"pm__promo\">\n<h2>Turn the yards into a quote<\/h2>\n<p>The calculator prices the concrete; the job has six more lines. 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>Bags or a truck<\/h2>\n<p>QUIKRETE and Sakrete both publish an 80 lb bag at 0.60 cu ft, so a cubic yard is 45 bags; a 60 lb bag at 0.45 cu ft is 60. The 12 by 12 patio is 88 bags with waste, 7,040 lb through a mixer one bag at a time.<\/p>\n<p>Bags win small work: post runs, a condenser pad, repairs. Past about a yard, the truck wins on your back before anything else.<\/p>\n<h2>Run the estimate in this order<\/h2>\n<ol class=\"pm__steps\">\n<li>\n<h3>Measure the pour, not the patio<\/h3>\n<p>Length, width, thickness. Thickness moves the total fastest, so confirm it against the plan first.<\/p>\n<\/li>\n<li>\n<h3>Add waste before you order<\/h3>\n<p>CIP 31 calls for 4% to 10% over plan. Uneven subgrade eats concrete you cannot see.<\/p>\n<\/li>\n<li>\n<h3>Get two plant quotes per yard<\/h3>\n<p>The national range brackets the market. A local quote typed into the calculator reprices the order exactly.<\/p>\n<\/li>\n<li>\n<h3>Put the whole job on paper<\/h3>\n<p>Concrete is one line. Base, forms, steel, labor, and finish are the rest of the estimate the customer signs.<\/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\/drywall-sheet-and-mud-calculator\/\">Drywall Calculator: Room Size to Sheets and Mud<\/a><\/li>\n<li><a href=\"https:\/\/www.simplywise.com\/blog\/fence-cost-calculator\/\">Fence Cost Calculator for Contractors<\/a><\/li>\n<li><a href=\"https:\/\/www.simplywise.com\/blog\/hardscape-pricing-guide\/\">Hardscape Pricing Guide for Contractors<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"pm__sources\">\n<h2>Sources<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.nrmca.org\/wp-content\/uploads\/2021\/01\/31pr.pdf\" rel=\"noopener\" target=\"_blank\">NRMCA CIP 31, Ordering Ready Mixed Concrete<\/a> (4% to 10% over plan; trucks 8 to 12 cu yd; verified 2026-08-27).<\/li>\n<li><a href=\"https:\/\/www.nrmca.org\/wp-content\/uploads\/Performance_Benchmarking_Survey_and_State_of_the_Industry.pdf\" rel=\"noopener\" target=\"_blank\">NRMCA, Performance Benchmarking Survey and State of the Industry<\/a> (2023 average $160 per cu yd; quartiles $150.03 to $170.66; verified 2026-08-27).<\/li>\n<li><a href=\"https:\/\/concretefinancialinsights.com\/us-concrete-industry-data\" rel=\"noopener\" target=\"_blank\">Concrete Financial Insights, US Concrete Industry Data<\/a> (large-producer index $113.08 in 2016 to $179.95 in 2025; verified 2026-08-27).<\/li>\n<li><a href=\"https:\/\/www.quikrete.com\/pdfs\/data_sheet-concrete%20mix%201101.pdf\" rel=\"noopener\" target=\"_blank\">QUIKRETE Concrete Mix, data sheet No. 1101<\/a> (80 lb yields 0.60 cu ft; 60 lb 0.45; verified 2026-08-27).<\/li>\n<li><a href=\"https:\/\/www.sakrete.com\/product\/high-strength-concrete-mix\/\" rel=\"noopener\" target=\"_blank\">Sakrete, High-Strength Concrete Mix<\/a> (same published yields: 80 lb 0.6 cu ft, 60 lb 0.45; verified 2026-08-27).<\/li>\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 2026-08-22).<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<section class=\"pm__faq\">\n<div class=\"pm__inner\">\n<h2>Common questions on slab pricing<\/h2>\n<details>\n<summary>How much does a 12 by 12 concrete slab cost?<\/summary>\n<div>\n<p>Order 2 cubic yards at 4 in thick with 10% waste. National averages of $160 to $180 per cubic yard put the concrete at $320 to $360, before base and labor.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>How many yards of concrete for a 24 by 24 slab?<\/summary>\n<div>\n<p>At 4 in thick the slab holds 7.11 cubic yards. With 10% waste you order 8. At 6 in, common for garages, the order is 11.75.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>How much does a 30 by 30 slab cost?<\/summary>\n<div>\n<p>At 4 in thick the order is 12.25 cubic yards, or $1,960 to $2,205 in concrete at the national averages. Mixers carry 8 to 12 yards, so plan on two trucks.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>How many 80 lb bags of concrete make a cubic yard?<\/summary>\n<div>\n<p>45. QUIKRETE and Sakrete both list an 80 lb bag at 0.60 cu ft, and 27 divided by 0.60 is 45. A 60 lb bag runs 60 to the yard.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>Does the calculator include labor or base prep?<\/summary>\n<div>\n<p>No. It prices the concrete from published national averages. Excavation, base, forms, reinforcement, labor, and finishing are local lines on the full estimate.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>Can SimplyWise price a concrete slab from a photo?<\/summary>\n<div>\n<p>Yes. SimplyWise Cost Estimator turns a photo into an itemized estimate in about 6 seconds. 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, order once<\/span><\/p>\n<h2>Turn the pour into a signed 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\": \"Concrete Slab Cost Calculator: Yards, Bags, and Price\",\n  \"description\": \"A concrete slab cost calculator that turns length, width, and thickness into yards to order, bag counts, and a sourced national price range, live on the page.\",\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\": \"2026-09-07\",\n  \"dateModified\": \"2026-09-07\",\n  \"mainEntityOfPage\": {\n    \"@type\": \"WebPage\",\n    \"@id\": \"https:\/\/www.simplywise.com\/blog\/concrete-slab-cost-calculator\/\"\n  },\n  \"url\": \"https:\/\/www.simplywise.com\/blog\/concrete-slab-cost-calculator\/\",\n  \"image\": [\n    \"https:\/\/images.unsplash.com\/photo-1743130940796-7a8e6e8b998e?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 the Cost of a Concrete Slab\",\n  \"step\": [\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 1,\n      \"name\": \"Measure the pour, not the patio\",\n      \"text\": \"Take length and width in feet and thickness in inches, then convert thickness to feet by dividing by 12. Multiply all three for cubic feet and divide by 27 for cubic yards.\"\n    },\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 2,\n      \"name\": \"Add waste before you order\",\n      \"text\": \"Order 4 to 10 percent more than the plan quantity per NRMCA CIP 31 to cover spillage, uneven subgrade, and over-excavation, then round the order up to the next quarter yard.\"\n    },\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 3,\n      \"name\": \"Get two plant quotes per yard\",\n      \"text\": \"Published national averages of 160 to 180 dollars per cubic yard bracket the market. Replace the range with a real quoted price from a local ready mix plant to price the order exactly.\"\n    },\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 4,\n      \"name\": \"Put the whole job on paper\",\n      \"text\": \"Add excavation, base rock, forms, reinforcement, labor, and finishing as separate lines, then present one itemized estimate for the customer to sign.\"\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\": \"How much does a 12 by 12 concrete slab cost?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Order 2 cubic yards at 4 inches thick with 10 percent waste. National averages of 160 to 180 dollars per cubic yard put the concrete at 320 to 360 dollars, before base and labor.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many yards of concrete for a 24 by 24 slab?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"At 4 inches thick the slab holds 7.11 cubic yards. With 10 percent waste you order 8 cubic yards. At 6 inches, common for garages, the order is 11.75 cubic yards.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How much does a 30 by 30 slab cost?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"At 4 inches thick the order is 12.25 cubic yards, or 1,960 to 2,205 dollars in concrete at published national averages. Truck mixers carry 8 to 12 cubic yards, so plan on two trucks.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many 80 lb bags of concrete make a cubic yard?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45 bags. QUIKRETE and Sakrete both list an 80 lb bag at 0.60 cubic feet, and 27 divided by 0.60 is 45. A 60 lb bag runs 60 to the cubic yard.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the calculator include labor or base prep?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. It prices the concrete from published national averages. Excavation, base, forms, reinforcement, labor, and finishing are local lines on the full estimate.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can SimplyWise price a concrete slab 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. 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\": \"Concrete Slab Cost Calculator: Yards, Bags, and Price\",\n      \"item\": \"https:\/\/www.simplywise.com\/blog\/concrete-slab-cost-calculator\/\"\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Blog &nbsp;&rsaquo;&nbsp; How to Estimate Contractor Calculator &middot; Concrete Concrete Slab Cost Calculator: Yards, Bags, and Price Concrete is sold by the cubic yard, so concrete slab cost is a volume question. Set the slab below; yards, bags, and dollars update as you type. Pricing the whole job? Estimate it from a photo in about [&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":"concrete slab cost","_yoast_wpseo_title":"Concrete Slab Cost Calculator: Yards, Bags, and Price","_yoast_wpseo_metadesc":"A concrete slab cost calculator that turns length, width, and thickness into yards to order, bag counts, and a sourced national price range, live on the page.","_yoast_wpseo_linkdex":"74","_yoast_wpseo_content_score":"90","_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_canonical":"","inline_featured_image":false,"footnotes":""},"categories":[181],"tags":[],"class_list":["post-8888","post","type-post","status-publish","format-standard","hentry","category-how-to-estimate"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Concrete Slab Cost Calculator: 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