{"id":61875,"date":"2021-05-14T10:35:34","date_gmt":"2021-05-14T08:35:34","guid":{"rendered":"https:\/\/wpcalc.com\/?p=61875"},"modified":"2026-09-30T18:11:29","modified_gmt":"2026-09-30T15:11:29","slug":"concrete-mix-ratio","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/engineering\/concrete-mix-ratio\/","title":{"rendered":"Concrete Mix Ratio 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\">Calculate Concrete Mix Materials by Volume<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"61875\" data-favorite-title=\"Concrete Mix Ratio\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/engineering\/concrete-mix-ratio\/\" data-favorite-excerpt=\"Estimate how much cement, sharp sand, gravel and water you need for a concrete pour. Enter the width, height and depth of your slab, footing or structure in meters and get material quantities instantly.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-engineering\">\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\/engineering\/concrete-mix-ratio\/\" method=\"POST\" class=\"calculator\" id=\"calculator-61875\" data-post=\"61875\"><fieldset class=\"fieldset-input\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field has-term\" id=\"input-1\"><label for=\"field-1\">Width<\/label><div class=\"term\">W<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"number\" name=\"width\" id=\"field-1\" aria-describedby=\"calc-unit-1\" step=\"0.01\" value=\"1\"\/><div class=\"unit\" id=\"calc-unit-1\">m<\/div><\/div><div class=\"field has-term\" id=\"input-2\"><label for=\"field-2\">Height<\/label><div class=\"term\">H<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"number\" name=\"height\" id=\"field-2\" aria-describedby=\"calc-unit-2\" step=\"0.01\" value=\"1\"\/><div class=\"unit\" id=\"calc-unit-2\">m<\/div><\/div><div class=\"field has-term\" id=\"input-3\"><label for=\"field-3\">Depth<\/label><div class=\"term\">D<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"number\" name=\"depth\" id=\"field-3\" aria-describedby=\"calc-unit-3\" step=\"0.01\" value=\"1\"\/><div class=\"unit\" id=\"calc-unit-3\">m<\/div><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"61875\">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> Your Results<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Volume<\/span><span class=\"result-term\">V<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"m\u00b3\"><\/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>Cement required<\/span><span class=\"result-term\">C<\/span><\/span><span class=\"field-value\" id=\"result-2\" 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-3\"><span class=\"field-title\"><span>Sharp Sand required<\/span><span class=\"result-term\">S<\/span><\/span><span class=\"field-value\" id=\"result-3\" 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-4\"><span class=\"field-title\"><span>Gravel required<\/span><span class=\"result-term\">G<\/span><\/span><span class=\"field-value\" id=\"result-4\" 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-5\"><span class=\"field-title\"><span>Water required<\/span><span class=\"result-term\">W<\/span><\/span><span class=\"field-value\" id=\"result-5\" data-unit=\"L\"><\/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=\"61875\" 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>Concrete Mix Ratio 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\\[ V = W \\cdot H \\cdot D \\\\ C = V \\cdot 320 \\\\ S = V \\cdot 600 \\\\ G = V \\cdot 1200 \\\\ W_{water} = V \\cdot 176 \\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(W\\) \u2014 width of the structure (m)<\/li>\n<li>\\(H\\) \u2014 height of the structure (m)<\/li>\n<li>\\(D\\) \u2014 depth of the structure (m)<\/li>\n<li>\\(V\\) \u2014 total concrete volume (m\u00b3)<\/li>\n<li>\\(C\\) \u2014 cement required (kg)<\/li>\n<li>\\(S\\) \u2014 sharp sand required (kg)<\/li>\n<li>\\(G\\) \u2014 gravel required (kg)<\/li>\n<li>\\(W_{water}\\) \u2014 water required (L)<\/li>\n<\/ul>\n<p>The material coefficients correspond to a general-purpose concrete mix of approximately 1 : 2 : 4 (cement : sand : gravel by mass), which is suitable for slabs, paths, footings and other non-structural or lightly loaded work.<\/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>Concrete Mix Ratio \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> a small concrete pad measuring 1 m wide, 1 m high (long) and 1 m deep, giving a volume of 1 m\u00b3.<\/p>\n<p>\\[ V = 1 \\cdot 1 \\cdot 1 = 1 \\text{ m}^3 \\]<\/p>\n<p>\\[ C = 1 \\cdot 320 = 320 \\text{ kg}, \\quad S = 1 \\cdot 600 = 600 \\text{ kg}, \\quad G = 1 \\cdot 1200 = 1200 \\text{ kg}, \\quad W_{water} = 1 \\cdot 176 = 176 \\text{ L} \\]<\/p>\n<p><strong>Result:<\/strong> for 1 m\u00b3 of concrete you need approximately 320 kg of cement, 600 kg of sharp sand, 1200 kg of gravel and 176 L of water.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to use the calculator<\/h2>\n<ol>\n<li>Measure your pour and enter the <strong>Width<\/strong> in meters (e.g. 2.5).<\/li>\n<li>Enter the <strong>Height<\/strong> in meters \u2014 for a slab this is the length of the pour.<\/li>\n<li>Enter the <strong>Depth<\/strong> in meters \u2014 for a slab this is the thickness (e.g. 0.1 for a 10 cm slab).<\/li>\n<li>Read the results: <strong>Volume<\/strong> in m\u00b3, plus <strong>Cement required<\/strong> (kg), <strong>Sharp Sand required<\/strong> (kg), <strong>Gravel required<\/strong> (kg) and <strong>Water required<\/strong> (L).<\/li>\n<\/ol>\n<p>For irregular shapes, split the pour into rectangular sections, calculate each one separately and add the material quantities together.<\/p>\n<h2>What is a concrete mix ratio?<\/h2>\n<p>A concrete mix ratio defines the proportions of cement, sand, gravel and water used to make concrete. The proportions determine the strength, workability and durability of the finished mix. This calculator is based on a general-purpose mix of roughly 1 : 2 : 4 (cement : sharp sand : gravel), a widely used recipe for paths, patios, shed bases, kerbs and similar DIY and light construction work. Stronger mixes for structural concrete, such as foundations and reinforced slabs, use more cement per cubic meter \u2014 always follow the specification on your plans if one exists.<\/p>\n<p>The calculator first computes the volume of the pour from its three dimensions, then multiplies that volume by fixed material coefficients: 320 kg of cement, 600 kg of sharp sand and 1200 kg of gravel per cubic meter, plus about 176 L of water. This gives a water-to-cement ratio of roughly 0.55, which produces a workable mix without being so wet that strength suffers.<\/p>\n<p>Because the coefficients are per cubic meter, the results scale linearly: doubling the volume doubles every material quantity. That makes it easy to plan deliveries \u2014 for example, cement is commonly sold in 25 kg bags, so 320 kg of cement works out to about 13 bags per cubic meter.<\/p>\n<h2>Assumptions, limitations and practical tips<\/h2>\n<ul>\n<li><strong>Rectangular shapes only.<\/strong> The volume formula \\( V = W \\cdot H \\cdot D \\) assumes a simple box. For circular or tapered pours, use a dedicated tool such as the <a href=\"https:\/\/wpcalc.com\/en\/engineering\/concrete-column-fill\/\">Concrete Column Fill<\/a> calculator.<\/li>\n<li><strong>General-purpose mix.<\/strong> The 1 : 2 : 4 proportions suit light-duty work. For structural elements, ask a professional or follow an engineer's specification, as the required strength may differ. See also our <a href=\"https:\/\/wpcalc.com\/en\/engineering\/concrete-ingredients\/\">Concrete Ingredients<\/a> calculator for a more detailed breakdown.<\/li>\n<li><strong>Allow for waste.<\/strong> Add 5\u201310 % to the material quantities to cover spillage, uneven subgrade and mixing losses. It is much cheaper than ordering a second load mid-pour.<\/li>\n<li><strong>Damp sand needs less water.<\/strong> If your sand is stored outside, reduce the added water accordingly; too much water weakens the cured concrete.<\/li>\n<li><strong>Consistency matters.<\/strong> Measure materials by weight, not by shovelful, when strength is important. For other surface work, such as rendering walls, use the <a href=\"https:\/\/wpcalc.com\/en\/engineering\/cement-and-sand-for-plastering\/\">Cement and Sand for Plastering<\/a> calculator instead.<\/li>\n<\/ul>\n<p>If you only need the volume of concrete to order from a ready-mix supplier, the <a href=\"https:\/\/wpcalc.com\/en\/engineering\/concrete-volume\/\">Concrete Volume<\/a> calculator handles that in a single step.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Estimate how much cement, sharp sand, gravel and water you need for a concrete pour. Enter the width, height and depth of your slab, footing or structure in meters and get material quantities instantly.<\/p>\n","protected":false},"author":70,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[96],"class_list":["post-61875","post","type-post","status-publish","format-standard","hentry","category-engineering","tag-concrete"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/61875","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\/70"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/comments?post=61875"}],"version-history":[{"count":2,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/61875\/revisions"}],"predecessor-version":[{"id":65958,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/61875\/revisions\/65958"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=61875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=61875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=61875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}