{"id":67427,"date":"2026-10-21T10:28:00","date_gmt":"2026-10-21T07:28:00","guid":{"rendered":"https:\/\/wpcalc.com\/en\/?p=67427"},"modified":"2026-10-21T10:28:00","modified_gmt":"2026-10-21T07:28:00","slug":"grass-seed-calculator","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/life\/grass-seed-calculator\/","title":{"rendered":"Grass Seed Calculator"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 id=\"calculator-title\" class=\"text-lg font-display font-bold\">Estimate Grass Seed, Bags and Cost for Your Lawn<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"67427\" data-favorite-title=\"Grass Seed\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/life\/grass-seed-calculator\/\" data-favorite-excerpt=\"Estimate how much grass seed your lawn needs. Enter your lawn dimensions, grass type and project type to get pounds of seed, number of bags and total cost.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-eco-home\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/en\/life\/grass-seed-calculator\/\" method=\"POST\" class=\"calculator\" id=\"calculator-67427\" data-post=\"67427\"><fieldset class=\"fieldset-input is-2\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"is-single field\" id=\"input-1\"><span class=\"font-semibold\">Lawn area<\/span><\/div><div class=\"field is-single\" id=\"input-2\"><label for=\"field-2\">Lawn shape<\/label><div class=\"grid grid-cols-1\"><select id=\"field-2\" name=\"lawn_shape\"><option value=\"rect\" selected>Rectangle (length \u00d7 width)<\/option><option value=\"circle\">Circle (diameter)<\/option><option value=\"total\">Total area (known)<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><div class=\"field\" id=\"input-3\"><label for=\"field-3\">Length<\/label><div class=\"field-group\"><input type=\"text\" name=\"length\" id=\"field-3\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"40\"\/><div class=\"grid grid-cols-1\"><select id=\"field-4\" name=\"unit\" aria-label=\"Unit\"><option value=\"ft\" selected>ft<\/option><option value=\"m\">m<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><\/div><div class=\"field\" id=\"input-4\"><label for=\"field-5\">Width<\/label><div class=\"field-group\"><input type=\"text\" name=\"width\" id=\"field-5\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"30\"\/><div class=\"grid grid-cols-1\"><select id=\"field-6\" name=\"unit\" aria-label=\"Unit\"><option value=\"ft\" selected>ft<\/option><option value=\"m\">m<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><\/div><div class=\"field\" id=\"input-5\" hidden><label for=\"field-7\">Diameter<\/label><div class=\"field-group\"><input type=\"text\" name=\"diameter\" id=\"field-7\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"20\"\/><div class=\"grid grid-cols-1\"><select id=\"field-8\" name=\"unit\" aria-label=\"Unit\"><option value=\"ft\" selected>ft<\/option><option value=\"m\">m<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><\/div><div class=\"field\" id=\"input-6\" hidden><label for=\"field-9\">Total area<\/label><div class=\"field-group\"><input type=\"text\" name=\"total_area\" id=\"field-9\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"1200\"\/><div class=\"grid grid-cols-1\"><select id=\"field-10\" name=\"area_unit\" aria-label=\"Area unit\"><option value=\"sqft\" selected>ft\u00b2<\/option><option value=\"sqm\">m\u00b2<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><\/div><div class=\"is-single field\" id=\"input-7\"><span class=\"font-semibold\">Grass type and project<\/span><\/div><div class=\"field is-single\" id=\"input-8\"><label for=\"field-12\">Grass type<\/label><div class=\"grid grid-cols-1\"><select id=\"field-12\" name=\"grass_type\"><option value=\"kbg\" selected>Kentucky bluegrass \u2014 2\u20133 \/ 1\u20131.5 lb per 1,000 ft\u00b2<\/option><option value=\"tallfescue\">Tall fescue \u2014 6\u20138 \/ 3\u20134 lb per 1,000 ft\u00b2<\/option><option value=\"perennialrye\">Perennial ryegrass \u2014 5\u20137 \/ 3\u20134 lb per 1,000 ft\u00b2<\/option><option value=\"finefescue\">Fine fescue \u2014 4\u20135 \/ 2\u20133 lb per 1,000 ft\u00b2<\/option><option value=\"bermuda\">Bermudagrass (hulled) \u2014 1\u20132 \/ 1 lb per 1,000 ft\u00b2<\/option><option value=\"zoysia\">Zoysiagrass \u2014 1\u20132 \/ 1 lb per 1,000 ft\u00b2<\/option><option value=\"custom\">Custom \u2014 set your own rate<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><div class=\"field\" id=\"input-9\" hidden><label for=\"field-13\">Custom seeding rate<\/label><input type=\"text\" name=\"custom_seeding_rate\" id=\"field-13\" aria-describedby=\"calc-unit-13 calc-info-13\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"3\"\/><div class=\"unit\" id=\"calc-unit-13\">lb\/1,000 ft\u00b2<\/div><small id=\"calc-info-13\">Pounds of seed per 1,000 ft\u00b2 for the project type you select below.<\/small><\/div><div class=\"field is-single\" id=\"input-10\" hidden><label for=\"field-14\">Custom grass season<\/label><div class=\"grid grid-cols-1\"><select id=\"field-14\" name=\"custom_grass_season\"><option value=\"cool\" selected>Cool-season grass<\/option><option value=\"warm\">Warm-season grass<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><div class=\"field is-single\" id=\"input-11\"><label for=\"field-15\">Project<\/label><div class=\"grid grid-cols-1\"><select id=\"field-15\" name=\"project\"><option value=\"new\" selected>New lawn (starting from bare soil)<\/option><option value=\"over\">Overseeding an existing lawn<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><div class=\"field\" id=\"input-12\"><label for=\"field-16\">Bag size<\/label><div class=\"field-group\"><input type=\"text\" name=\"bag_size\" id=\"field-16\" aria-describedby=\"calc-info-16\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"5\"\/><div class=\"grid grid-cols-1\"><select id=\"field-17\" name=\"unit\" aria-label=\"Unit\"><option value=\"lb\" selected>lb<\/option><option value=\"kg\">kg<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-16\">Seed is commonly sold in 1, 3, 5, 10, 20, 25 and 50 lb bags.<\/small><\/div><div class=\"field\" id=\"input-13\"><label for=\"field-18\">Price per bag<\/label><input type=\"text\" name=\"price_per_bag\" id=\"field-18\" aria-describedby=\"calc-unit-18 calc-info-18\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"30\"\/><div class=\"unit\" id=\"calc-unit-18\">$<\/div><small id=\"calc-info-18\">Optional \u2014 clear this field to omit the cost estimate.<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"67427\">Calculate<\/button><button type=\"reset\">Reset<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calculate automatically<\/label><small>If enabled, the result will update automatically when you change any value.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Grass Seed Estimate<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Lawn area<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"ft\u00b2\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-2\"><span class=\"field-title\"><span>Lawn area<\/span><\/span><span class=\"field-value\" id=\"result-2\" data-unit=\"m\u00b2\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-3\"><span class=\"field-title\"><span>Seeding rate used<\/span><\/span><span class=\"field-value\" id=\"result-3\" data-unit=\"lb\/1,000 ft\u00b2\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-4\"><span class=\"field-title\"><span>Grass seed needed<\/span><\/span><span class=\"field-value\" id=\"result-4\" data-unit=\"lb\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-5\"><span class=\"field-title\"><span>Grass seed needed<\/span><\/span><span class=\"field-value\" id=\"result-5\" data-unit=\"kg\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-6\"><span class=\"field-title\"><span>Bags to buy<\/span><\/span><span class=\"field-value\" id=\"result-6\" data-unit=\"bags\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-7\"><span class=\"field-title\"><span>Estimated cost<\/span><\/span><span class=\"field-value\" id=\"result-7\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result is-column\" id=\"output-8\"><span class=\"field-title\"><span>When to seed<\/span><\/span><span class=\"field-value\" id=\"result-8\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result is-column\" id=\"output-9\"><span class=\"field-title\"><span>Calculation notes<\/span><\/span><span class=\"field-value\" id=\"result-9\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copy link to this calculation<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Leave a Comment<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"67427\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">How did this result make you feel?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Like <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">Helpful <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confused <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Disappointed <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\u274c <\/span><span class=\"reaction-description font-medium\">Inaccurate <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>Grass Seed Formula<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">Formula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\n\\[ A = L \\times W \\qquad A = \\frac{\\pi d^{2}}{4} \\qquad \\text{Seed (lb)} = \\frac{A}{1000} \\times r \\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(A\\) \u2014 lawn area in ft\u00b2<\/li>\n<li>\\(L\\), \\(W\\) \u2014 length and width of a rectangular lawn (converted to feet)<\/li>\n<li>\\(d\\) \u2014 diameter of a circular lawn (converted to feet)<\/li>\n<li>\\(r\\) \u2014 seeding rate in lb per 1,000 ft\u00b2, which depends on the grass type and whether you are seeding a new lawn or overseeding<\/li>\n<\/ul>\n<p>The lawn area is computed first, based on the shape you choose, and everything entered in meters is converted to feet (1 m = 3.28084 ft) so a single seeding rate per 1,000 ft\u00b2 can be used. The seed weight is then scaled to your lawn size, converted to whole bags by rounding up, and multiplied by the price per bag.<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-459\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>Grass Seed \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> a new rectangular lawn 40 ft long and 30 ft wide, seeded with Kentucky bluegrass. Seed is sold in 5 lb bags at $30 per bag.<\/p>\n<p>\\[ A = 40 \\times 30 = 1200\\ \\text{ft}^2 \\]<\/p>\n<p>For a new Kentucky bluegrass lawn the calculator uses the midpoint of the typical 2\u20133 lb\/1,000 ft\u00b2 range, so \\(r = 2.5\\):<\/p>\n<p>\\[ \\text{Seed} = \\frac{1200}{1000} \\times 2.5 = 3\\ \\text{lb} \\]<\/p>\n<p>Bags: \\(3 \\div 5 = 0.6\\), rounded up to 1 whole bag. Cost: \\(1 \\times 30 =\\) $30.<\/p>\n<p><strong>Result:<\/strong> a 1,200 ft\u00b2 (111.5 m\u00b2) lawn needs about 3 lb (1.36 kg) of seed \u2014 buy one 5 lb bag for roughly $30.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to Use the Calculator<\/h2>\n<ol>\n<li>Pick the <strong>Lawn shape<\/strong>: rectangle, circle, or enter a known <strong>Total area<\/strong> directly. Only the fields for that shape are shown.<\/li>\n<li>Enter your dimensions in the <strong>Length<\/strong> and <strong>Width<\/strong> fields (or <strong>Diameter<\/strong>, or <strong>Total area<\/strong>) and set the unit to ft or m.<\/li>\n<li>Select the <strong>Grass type<\/strong>. Choose <em>Custom<\/em> only if your seed bag specifies a rate that is not listed \u2014 then fill in the <strong>Custom seeding rate<\/strong> and the season of your grass.<\/li>\n<li>Choose the <strong>Project<\/strong>: a new lawn from bare soil or overseeding an existing lawn. Overseeding uses roughly half the seed of a new lawn.<\/li>\n<li>Enter the <strong>Bag size<\/strong> in lb or kg and, optionally, the <strong>Price per bag<\/strong>. Leave the price empty if you only need the seed quantity.<\/li>\n<\/ol>\n<h2>What the Results Mean<\/h2>\n<p>The <strong>Lawn area<\/strong> is shown in both ft\u00b2 and m\u00b2, so you can double-check it against your measurements. The <strong>Seeding rate used<\/strong> is the midpoint of the typical range for your grass type and project \u2014 a starting point, not a rule set in stone.<\/p>\n<p><strong>Grass seed needed<\/strong> is the total weight of seed to spread over the whole lawn once. Spreading it evenly matters as much as the quantity: too little leaves thin spots, while too much causes seedlings to compete with each other and die off, wasting money.<\/p>\n<p><strong>Bags to buy<\/strong> is always rounded up to whole bags, since stores do not sell fractions of a bag. <strong>Estimated cost<\/strong> covers seed only \u2014 it does not include soil preparation, starter fertilizer, mulch, or delivery.<\/p>\n<p>The <strong>When to seed<\/strong> panel gives timing advice for cool-season grasses (Kentucky bluegrass, fescues, ryegrass \u2014 best in early fall) and warm-season grasses (Bermuda, zoysia \u2014 best in late spring to early summer). Timing has a bigger effect on success than almost any other factor, because seedlings need the right soil temperature to germinate and enough time to establish before weather stress.<\/p>\n<h2>Seeding Rates by Grass Type<\/h2>\n<table>\n<thead>\n<tr>\n<th>Grass type<\/th>\n<th>New lawn (lb\/1,000 ft\u00b2)<\/th>\n<th>Overseeding (lb\/1,000 ft\u00b2)<\/th>\n<th>Season<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Kentucky bluegrass<\/td>\n<td>2\u20133<\/td>\n<td>1\u20131.5<\/td>\n<td>Cool<\/td>\n<\/tr>\n<tr>\n<td>Tall fescue<\/td>\n<td>6\u20138<\/td>\n<td>3\u20134<\/td>\n<td>Cool<\/td>\n<\/tr>\n<tr>\n<td>Perennial ryegrass<\/td>\n<td>5\u20137<\/td>\n<td>3\u20134<\/td>\n<td>Cool<\/td>\n<\/tr>\n<tr>\n<td>Fine fescue<\/td>\n<td>4\u20135<\/td>\n<td>2\u20133<\/td>\n<td>Cool<\/td>\n<\/tr>\n<tr>\n<td>Bermudagrass (hulled)<\/td>\n<td>1\u20132<\/td>\n<td>1<\/td>\n<td>Warm<\/td>\n<\/tr>\n<tr>\n<td>Zoysiagrass<\/td>\n<td>1\u20132<\/td>\n<td>1<\/td>\n<td>Warm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Use the lower end of the range on well-prepared, irrigated soil, and the upper end for heavy-traffic areas, erosion-prone slopes, or thickening up a poor existing lawn.<\/p>\n<h2>Assumptions, Limitations and Tips<\/h2>\n<ul>\n<li><strong>The seed bag label wins.<\/strong> If the label on your product specifies a rate, use it \u2014 seed quality (germination and purity percentages) varies between brands, and coated seed needs higher rates by weight because part of the weight is coating, not seed.<\/li>\n<li><strong>Buy a small buffer.<\/strong> Many people round up one extra bag for touch-ups a few weeks after germination, when bare patches appear. Because bags are rounded up automatically, the buffer often costs nothing.<\/li>\n<li><strong>Good seed-soil contact is assumed.<\/strong> Rake the surface lightly before and after spreading, and keep the top inch of soil consistently moist until germination. If you are starting from scratch, prepare the ground first \u2014 the <a href=\"https:\/\/wpcalc.com\/en\/life\/topsoil-calculator\/\">topsoil calculator<\/a> helps you order the right amount of soil, and the <a href=\"https:\/\/wpcalc.com\/en\/life\/square-footage-calculator\/\">square footage calculator<\/a> can confirm odd-shaped areas.<\/li>\n<li><strong>Seed or sod?<\/strong> Seeding is cheaper but takes weeks to establish. If you need an instant lawn, the <a href=\"https:\/\/wpcalc.com\/en\/life\/sod-calculator\/\">sod calculator<\/a> estimates rolls and cost for the same area.<\/li>\n<li><strong>Estimates only.<\/strong> Actual needs vary with weather, watering, soil condition and how evenly your spreader distributes. Treat the result as a shopping estimate, not a guarantee.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Estimate how much grass seed your lawn needs. Enter your lawn dimensions, grass type and project type to get pounds of seed, number of bags and total cost.<\/p>\n","protected":false},"author":3168,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[66],"class_list":["post-67427","post","type-post","status-publish","format-standard","hentry","category-life","tag-household"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/67427","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/users\/3168"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/comments?post=67427"}],"version-history":[{"count":1,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/67427\/revisions"}],"predecessor-version":[{"id":67428,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/67427\/revisions\/67428"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=67427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=67427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=67427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}