{"id":8657,"date":"2026-08-27T09:00:00","date_gmt":"2026-08-27T09:00:00","guid":{"rendered":"https:\/\/www.simplywise.com\/blog\/?p=8657"},"modified":"2026-08-27T16:56:12","modified_gmt":"2026-08-27T16:56:12","slug":"drywall-sheet-and-mud-calculator","status":"publish","type":"post","link":"https:\/\/www.simplywise.com\/blog\/drywall-sheet-and-mud-calculator\/","title":{"rendered":"Drywall Calculator: Room Size to Sheets and Mud"},"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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&& 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; Drywall<\/span><\/p>\n<h1>Drywall Calculator: Room Size to Sheets and Mud<\/h1>\n<p class=\"pm__dek\">A drywall calculator that stops at sheet count is half a material list. Compound, tape, and screws come off the same square footage.<\/p>\n<p class=\"pm__dek-cta\">Short on time? <a href=\"https:\/\/swcostestimator.app.link\/ce-ai\" rel=\"noopener\" target=\"_blank\">Price the hang and finish 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 August 27, 2026<\/span><br \/>\n<i><\/i><br \/>\n<span>5 min read<\/span>\n<\/div>\n<figure class=\"pm__fig\">\n<img decoding=\"async\" alt=\"Room under construction with a stack of gypsum board leaning against the left wall, steel studs and rough plumbing on the right, and a lidded pail of joint compound on the floor\" loading=\"eager\" src=\"https:\/\/images.unsplash.com\/photo-1768321902863-56fd5963a726?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>Add wall area and ceiling area. That gross number drives every line.<\/li>\n<li>Divide by panel coverage: 32 sq ft for a 4 by 8, 48 sq ft for a 4 by 12.<\/li>\n<li>Do not deduct doors and windows. You sheet over and cut them out.<\/li>\n<li>Joint compound runs about 10 gallons per 1,000 sq ft of panel, per USG.<\/li>\n<li>Paper tape runs about 370 feet per 1,000 sq ft of panel, per USG.<\/li>\n<li>Screw spacing is 12 in on ceilings, 16 in on walls at 16 in framing, per GA-216.<\/li>\n<\/ol>\n<div class=\"pm__tldr-cta\"><span>Price the hang and the finish 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>The drywall calculator formula<\/h2>\n<p>A drywall calculator runs two steps. Get gross board area, then divide by the coverage of the panel you hang.<\/p>\n<p>Gross board area is wall area plus ceiling area. Wall area is room perimeter times ceiling height. Ceiling area is length times width.<\/p>\n<p>Then divide by panel coverage and round up. Panels are 4 ft wide with tapered long edges, and USG lists lengths from 8 ft to 16 ft.<\/p>\n<table class=\"pm__table\">\n<thead>\n<tr>\n<th>Panel size<\/th>\n<th>Coverage<\/th>\n<th>Where it earns its keep<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>4 ft by 8 ft<\/td>\n<td>32 sq ft<\/td>\n<td>Closets and stairwells<\/td>\n<\/tr>\n<tr>\n<td>4 ft by 10 ft<\/td>\n<td>40 sq ft<\/td>\n<td>10 ft walls in one vertical course<\/td>\n<\/tr>\n<tr>\n<td>4 ft by 12 ft<\/td>\n<td>48 sq ft<\/td>\n<td>8 ft walls, fewest butt joints<\/td>\n<\/tr>\n<tr>\n<td>4 ft by 14 ft<\/td>\n<td>56 sq ft<\/td>\n<td>Long hallways<\/td>\n<\/tr>\n<tr>\n<td>4 ft by 16 ft<\/td>\n<td>64 sq ft<\/td>\n<td>Commercial runs with a lift<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Here is the step most calculators get wrong. Do not deduct doors and windows. Hangers run board past an opening and cut it out afterward, because a seam at a corner cracks. That cutout is waste.<\/p>\n<h2>Worked example: a 12 by 14 bedroom<\/h2>\n<p>Perimeter is 52 ft. At an 8 ft ceiling that is 416 sq ft of wall, and the ceiling adds 168, so <strong>584 sq ft<\/strong> gross.<\/p>\n<p>In 4 by 12 panels that is 584 divided by 48, or 12.17, so <strong>13 sheets<\/strong>. In 4 by 8 it is 584 divided by 32, or 18.25, so <strong>19 sheets<\/strong>. Six extra pieces to carry and tape.<\/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 into an itemized, branded estimate in about 6 seconds.<\/p>\n<h2>Worked example: a 24 by 24 garage<\/h2>\n<p>Perimeter is 96 ft. At a 9 ft wall that is 864 sq ft, and the ceiling adds 576, for <strong>1,440 sq ft<\/strong> gross.<\/p>\n<p>In 4 by 12 panels that lands on exactly 30 sheets. Compound at the USG rate is 14.4 gallons, so three 4.5 gallon pails leaves you 0.9 gallon short on the last coat. Tape is 533 ft, so a 500 ft roll is 33 ft short. Both are a second trip.<\/p>\n<h2>Mud and tape come off the same square footage<\/h2>\n<p>USG publishes coverage against panel area, not joint length, which keeps the math simple.<\/p>\n<p>Ready-mixed all-purpose compound runs about 10 gallons per 1,000 sq ft of panels. The lightweight version runs 9.4. Setting-type powder runs 72 lb, five 25 lb bags on that garage. Paper tape runs about 370 ft.<\/p>\n<p>Those rates assume a three coat finish. At Level 5 the Gypsum Association requires a skim coat over the entire surface on top of Level 4, so compound goes up while tape does not.<\/p>\n<section class=\"pm__promo\">\n<h2>Skip the retyping<\/h2>\n<p>Once quantities are settled, hand typing is the slowest part. SimplyWise Cost Estimator turns a photo into an itemized, branded 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>Screws follow the spacing, not a habit<\/h2>\n<p>GA-216 is plain: screws not more than 12 in on center for ceilings, 16 in on center for walls at 16 in framing. At 24 in framing it is 12 in for both.<\/p>\n<p>Run that against a 4 by 12 wall panel: 10 studs behind the sheet, 4 screws down each, so about 40 screws. Fastener heads also take three coats, each in a different direction.<\/p>\n<h2>Reference table: room size to material<\/h2>\n<p>Walls plus ceiling at 8 ft, gross area, no deductions.<\/p>\n<table class=\"pm__table\">\n<thead>\n<tr>\n<th>Room<\/th>\n<th>Gross area<\/th>\n<th>4 by 8 sheets<\/th>\n<th>4 by 12 sheets<\/th>\n<th>Compound<\/th>\n<th>Tape<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>8 ft by 10 ft<\/td>\n<td>368 sq ft<\/td>\n<td>12<\/td>\n<td>8<\/td>\n<td>3.7 gal<\/td>\n<td>136 ft<\/td>\n<\/tr>\n<tr>\n<td>10 ft by 12 ft<\/td>\n<td>472 sq ft<\/td>\n<td>15<\/td>\n<td>10<\/td>\n<td>4.7 gal<\/td>\n<td>175 ft<\/td>\n<\/tr>\n<tr>\n<td>12 ft by 14 ft<\/td>\n<td>584 sq ft<\/td>\n<td>19<\/td>\n<td>13<\/td>\n<td>5.8 gal<\/td>\n<td>216 ft<\/td>\n<\/tr>\n<tr>\n<td>14 ft by 16 ft<\/td>\n<td>704 sq ft<\/td>\n<td>22<\/td>\n<td>15<\/td>\n<td>7.0 gal<\/td>\n<td>260 ft<\/td>\n<\/tr>\n<tr>\n<td>16 ft by 20 ft<\/td>\n<td>896 sq ft<\/td>\n<td>28<\/td>\n<td>19<\/td>\n<td>9.0 gal<\/td>\n<td>332 ft<\/td>\n<\/tr>\n<tr>\n<td>20 ft by 24 ft<\/td>\n<td>1,184 sq ft<\/td>\n<td>37<\/td>\n<td>25<\/td>\n<td>11.8 gal<\/td>\n<td>438 ft<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Run it in this order<\/h2>\n<ol class=\"pm__steps\">\n<li>\n<h3>Measure the perimeter, not each wall<\/h3>\n<p>Perimeter times ceiling height gives wall area in one step. Add length times width for the ceiling.<\/p>\n<\/li>\n<li>\n<h3>Pick the panel before you divide<\/h3>\n<p>Longer panels cut butt joints, and butt joints are the ones that telegraph.<\/p>\n<\/li>\n<li>\n<h3>Run mud and tape off the gross area<\/h3>\n<p>Buy the container size that clears the number, not the one that nearly does.<\/p>\n<\/li>\n<li>\n<h3>Price the finish level separately<\/h3>\n<p>Level 4 and Level 5 are not the same labor or the same compound. Put it on the quote.<\/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\/paint-coverage-calculator-sq-ft-to-gallons\/\">Paint Coverage Calculator: Square Feet to Gallons<\/a><\/li>\n<li><a href=\"https:\/\/www.simplywise.com\/blog\/how-to-estimate-drywall-jobs\/\">How to Estimate Drywall Jobs<\/a><\/li>\n<li><a href=\"https:\/\/www.simplywise.com\/blog\/drywall-estimate-template\/\">Drywall Estimate Template<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"pm__sources\">\n<h2>Sources<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.usg.com\/content\/dam\/USG_Marketing_Communications\/united_states\/product_promotional_materials\/finished_assets\/sheetrock-all-purpose-joint-compound-submittal-J1969.pdf\" rel=\"noopener\" target=\"_blank\">USG, All Purpose Joint Compound submittal<\/a> (10 gal. per 1,000 sq. ft.; verified 2026-08-22).<\/li>\n<li><a href=\"https:\/\/www.usg.com\/content\/dam\/USG\/pdpmovedocuments\/sheetrock-plus3-lightweight-all-purpose-joint-compound-submittal-J498A.pdf\" rel=\"noopener\" target=\"_blank\">USG, Plus 3 lightweight compound submittal<\/a> (9.4 gal.; verified 2026-08-22).<\/li>\n<li><a href=\"https:\/\/www.usg.com\/content\/dam\/USG_Marketing_Communications\/united_states\/product_promotional_materials\/finished_assets\/sheetrock-settingtype-joint-compounds-durabond-submittal-J17A.pdf\" rel=\"noopener\" target=\"_blank\">USG, Durabond setting type submittal<\/a> (72 lb. per 1,000 sq. ft.; verified 2026-08-22).<\/li>\n<li><a href=\"https:\/\/www.usg.com\/content\/dam\/USG_Marketing_Communications\/united_states\/product_promotional_materials\/finished_assets\/sheetrock-paper-joint-tape-submittal-J1736.pdf\" rel=\"noopener\" target=\"_blank\">USG, Sheetrock Brand Paper Joint Tape submittal<\/a> (370 ft. per 1,000 sq. ft.; 2026-08-22).<\/li>\n<li><a href=\"https:\/\/www.usg.com\/content\/dam\/USG_Marketing_Communications\/united_states\/product_promotional_materials\/finished_assets\/sheetrock-ultralight-panels-submittal-en-wb2501.pdf\" rel=\"noopener\" target=\"_blank\">USG, Sheetrock Brand UltraLight Panels submittal<\/a> (4 ft. width, 8 to 16 ft. lengths; 2026-08-22).<\/li>\n<li><a href=\"https:\/\/www.gypsum.org\/wp-content\/uploads\/2011\/11\/GA-216-2010.pdf\" rel=\"noopener\" target=\"_blank\">Gypsum Association GA-216-2010, Application and Finishing of Gypsum Panel Products<\/a> (Section 5.4 screw spacing; free 2010 edition; GA-216-2016 sets the same spacing in different wording; current: GA-216-2024; verified 2026-08-27).<\/li>\n<li><a href=\"https:\/\/www.americangypsum.com\/sites\/default\/files\/2022-05\/ga-214-2021_17.pdf\" rel=\"noopener\" target=\"_blank\">Gypsum Association GA-214-2021, Levels of Finish<\/a> (Level 5 skim coat; 2026-08-22).<\/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 from drywall subs<\/h2>\n<details>\n<summary>How does a drywall calculator handle doors and windows?<\/summary>\n<div>\n<p>It should not. Board runs past the opening and gets cut out so no seam lands at a corner. The offcut is waste, so order on gross area.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>How many sheets of drywall for a 12 by 14 room?<\/summary>\n<div>\n<p>Walls and ceiling come to 584 sq ft at an 8 ft ceiling. That is 13 sheets in 4 by 12, or 19 in 4 by 8.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>How much joint compound per sheet of drywall?<\/summary>\n<div>\n<p>Work off panel area, not sheets. USG lists approximately 10 gallons of all purpose compound per 1,000 sq ft of panels, and 9.4 for lightweight.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>How much drywall tape do I need?<\/summary>\n<div>\n<p>USG lists approximately 370 ft of paper tape per 1,000 sq ft of panels. Rolls run 75 ft, 250 ft, and 500 ft.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>What is the screw spacing for drywall?<\/summary>\n<div>\n<p>GA-216 caps it at 12 in on center on ceilings and 16 in on walls, at 16 in framing. At 24 in framing it is 12 in for both.<\/p>\n<\/div>\n<\/details>\n<details>\n<summary>Can SimplyWise price a drywall job 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\">Count it once, count it right<\/span><\/p>\n<h2>Turn the takeoff into a signed quote.<\/h2>\n<p>Snap a photo and get an itemized, branded 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\": \"Drywall Calculator: Room Size to Sheets and Mud\",\n  \"description\": \"A drywall calculator that turns room dimensions into sheet count, joint compound gallons, tape footage, and screws, with the published coverage rates behind each number.\",\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\": \"2026-08-27\",\n  \"dateModified\": \"2026-08-27\",\n  \"mainEntityOfPage\": {\n    \"@type\": \"WebPage\",\n    \"@id\": \"https:\/\/www.simplywise.com\/blog\/drywall-sheet-and-mud-calculator\/\"\n  },\n  \"url\": \"https:\/\/www.simplywise.com\/blog\/drywall-sheet-and-mud-calculator\/\",\n  \"image\": [\n    \"https:\/\/images.unsplash.com\/photo-1768321902863-56fd5963a726?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 Drywall Sheets, Joint Compound, and Tape\",\n  \"step\": [\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 1,\n      \"name\": \"Measure the perimeter, not each wall\",\n      \"text\": \"Multiply the room perimeter by the ceiling height to get wall area in one step, then add length times width for the ceiling to reach gross board area.\"\n    },\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 2,\n      \"name\": \"Pick the panel before you divide\",\n      \"text\": \"Choose the panel length that cuts the most butt joints, then divide gross board area by that panel's coverage and round up: 32 square feet for a 4 by 8, 48 square feet for a 4 by 12.\"\n    },\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 3,\n      \"name\": \"Run mud and tape off the gross area\",\n      \"text\": \"Apply roughly 10 gallons of all purpose joint compound and 370 feet of paper tape per 1,000 square feet of gypsum panels, then buy the container size that clears the number rather than the one that nearly does.\"\n    },\n    {\n      \"@type\": \"HowToStep\",\n      \"position\": 4,\n      \"name\": \"Price the finish level separately\",\n      \"text\": \"State the level of finish on the quote, because a Level 5 skim coat over the entire surface is more compound and more labor than a Level 4.\"\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 does a drywall calculator handle doors and windows?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"It should not deduct them. Board runs past the opening and gets cut out so no seam lands at a corner. The offcut is waste, so order on gross area.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many sheets of drywall for a 12 by 14 room?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Walls and ceiling come to 584 square feet at an 8 foot ceiling. That is 13 sheets in 4 by 12, or 19 sheets in 4 by 8.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How much joint compound per sheet of drywall?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Work off panel area, not sheets. USG lists approximately 10 gallons of all purpose compound per 1,000 square feet of gypsum panels, and about 9.4 gallons for the lightweight version.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How much drywall tape do I need?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"USG lists approximately 370 feet of paper tape per 1,000 square feet of panels. Rolls come in 75 foot, 250 foot, and 500 foot lengths.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the screw spacing for drywall?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"GA-216 calls for not more than 12 inches on center on ceilings and 16 inches on center on walls where framing is 16 inches on center. At 24 inch framing it is 12 inches for both.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can SimplyWise price a drywall job from a photo?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. SimplyWise Cost Estimator turns a photo into an itemized, branded estimate in about 6 seconds. 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Compound, tape, and screws come off the same square footage. Short on time? Price the hang and finish from a photo in about six seconds. [&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":"drywall calculator","_yoast_wpseo_title":"Drywall Calculator: Room Size to Sheets and Mud","_yoast_wpseo_metadesc":"A drywall calculator that turns room dimensions into sheet count, joint compound gallons, tape footage, and screws, with the published coverage rates behind each number.","_yoast_wpseo_linkdex":"72","_yoast_wpseo_content_score":"90","_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_canonical":"","inline_featured_image":false,"footnotes":""},"categories":[181],"tags":[],"class_list":["post-8657","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>Drywall Calculator: Room Size to Sheets and 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