{"id":66573,"date":"2026-10-08T16:44:48","date_gmt":"2026-10-08T13:44:48","guid":{"rendered":"https:\/\/wpcalc.com\/en\/?p=66573"},"modified":"2026-10-08T16:44:48","modified_gmt":"2026-10-08T13:44:48","slug":"baking-pan-size-calculator","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/life\/baking-pan-size-calculator\/","title":{"rendered":"Baking Pan Size 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\">Adapt a Recipe to a Different Pan<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"66573\" data-favorite-title=\"Baking Pan Size\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/life\/baking-pan-size-calculator\/\" data-favorite-excerpt=\"Convert any recipe to a different baking pan. Enter the original and replacement pan shapes, dimensions and batter depth to get a scaling factor for every ingredient.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-food\">\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\/baking-pan-size-calculator\/\" method=\"POST\" class=\"calculator\" id=\"calculator-66573\" data-post=\"66573\"><fieldset class=\"fieldset-input is-1\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"is-single field\" id=\"input-1\"><span class=\"font-semibold\">Original Pan<\/span><\/div><div class=\"field\" id=\"input-2\"><label for=\"field-2\">Shape<\/label><div class=\"grid grid-cols-1\"><select id=\"field-2\" name=\"shape\"><option value=\"round\">Round (by diameter)<\/option><option value=\"square\">Square (by side)<\/option><option value=\"rect\" selected>Rectangle (length \u00d7 width)<\/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 has-term\" id=\"input-3\"><label for=\"field-3\">Length \/ diameter<\/label><div class=\"term\">a<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"length_diameter\" id=\"field-3\" aria-describedby=\"calc-info-3\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"1\" max=\"100\" value=\"9\"\/><div class=\"grid grid-cols-1\"><select id=\"field-4\" name=\"unit\" aria-label=\"Unit\"><option value=\"in\" selected>in<\/option><option value=\"cm\">cm<\/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-3\">Diameter for round, side for square, long side for rectangle<\/small><\/div><div class=\"field has-term\" id=\"input-4\"><label for=\"field-5\">Width<\/label><div class=\"term\">b<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"width\" id=\"field-5\" aria-describedby=\"calc-info-5\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"1\" max=\"100\" value=\"13\"\/><div class=\"grid grid-cols-1\"><select id=\"field-6\" name=\"unit\" aria-label=\"Unit\"><option value=\"in\" selected>in<\/option><option value=\"cm\">cm<\/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-5\">Short side of the rectangle<\/small><\/div><div class=\"field has-term\" id=\"input-5\"><label for=\"field-7\">Batter 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><div class=\"field-group\"><input type=\"text\" name=\"batter_depth\" id=\"field-7\" aria-describedby=\"calc-info-7\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0.25\" max=\"10\" value=\"2\"\/><div class=\"grid grid-cols-1\"><select id=\"field-8\" name=\"unit\" aria-label=\"Unit\"><option value=\"in\" selected>in<\/option><option value=\"cm\">cm<\/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-7\">How deep the batter sits in the pan \u2014 2 in (5 cm) is typical<\/small><\/div><div class=\"is-single field\" id=\"input-6\"><span class=\"font-semibold\">Replacement Pan<\/span><\/div><div class=\"field\" id=\"input-7\"><label for=\"field-10\">Shape<\/label><div class=\"grid grid-cols-1\"><select id=\"field-10\" name=\"shape\"><option value=\"round\" selected>Round (by diameter)<\/option><option value=\"square\">Square (by side)<\/option><option value=\"rect\">Rectangle (length \u00d7 width)<\/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 has-term\" id=\"input-8\"><label for=\"field-11\">Length \/ diameter<\/label><div class=\"term\">a<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"length_diameter\" id=\"field-11\" aria-describedby=\"calc-info-11\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"1\" max=\"100\" value=\"9\"\/><div class=\"grid grid-cols-1\"><select id=\"field-12\" name=\"unit\" aria-label=\"Unit\"><option value=\"in\" selected>in<\/option><option value=\"cm\">cm<\/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-11\">Diameter for round, side for square, long side for rectangle<\/small><\/div><div class=\"field has-term\" id=\"input-9\" hidden><label for=\"field-13\">Width<\/label><div class=\"term\">b<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"width\" id=\"field-13\" aria-describedby=\"calc-info-13\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"1\" max=\"100\" value=\"9\"\/><div class=\"grid grid-cols-1\"><select id=\"field-14\" name=\"unit\" aria-label=\"Unit\"><option value=\"in\" selected>in<\/option><option value=\"cm\">cm<\/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-13\">Short side of the rectangle<\/small><\/div><div class=\"field has-term\" id=\"input-10\"><label for=\"field-15\">Batter 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><div class=\"field-group\"><input type=\"text\" name=\"batter_depth\" id=\"field-15\" aria-describedby=\"calc-info-15\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0.25\" max=\"10\" value=\"2\"\/><div class=\"grid grid-cols-1\"><select id=\"field-16\" name=\"unit\" aria-label=\"Unit\"><option value=\"in\" selected>in<\/option><option value=\"cm\">cm<\/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-15\">Target batter depth in the new pan<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"66573\">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> Pan Comparison &amp; Ingredient Adjustment<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Scaling factor (new \u00f7 original)<\/span><span class=\"result-term\">k<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"\u00d7\"><\/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-2\"><span class=\"field-title\"><span>Suggested ingredient adjustment<\/span><span class=\"result-term\">advice<\/span><\/span><span class=\"field-value\" id=\"result-2\"><\/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-3\"><span class=\"field-title\"><span>Pan areas, volumes and capacity<\/span><span class=\"result-term\">pans<\/span><\/span><span class=\"field-value\" id=\"result-3\"><\/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=\"66573\" 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>Baking Pan Size 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 = \\begin{cases} \\dfrac{\\pi a^2}{4} &amp; \\text{round pan (} a \\text{ = diameter)} \\\\ a^2 &amp; \\text{square pan} \\\\ a \\times b &amp; \\text{rectangle pan} \\end{cases} \\]\n\\[ V = A \\times d \\]\n\\[ k = \\dfrac{V_{new}}{V_{old}} = \\dfrac{A_{new} \\times d_{new}}{A_{old} \\times d_{old}} \\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(A\\) \u2014 base area of the pan<\/li>\n<li>\\(a\\) \u2014 diameter (round), side (square) or length (rectangle)<\/li>\n<li>\\(b\\) \u2014 width of a rectangular pan<\/li>\n<li>\\(d\\) \u2014 depth of the batter in the pan<\/li>\n<li>\\(V\\) \u2014 volume of batter the pan holds at that depth<\/li>\n<li>\\(k\\) \u2014 scaling factor: multiply every ingredient by this number<\/li>\n<\/ul>\n<p>The scaling factor is simply the ratio of the batter volumes. Because the calculator works from volume rather than pan dimensions alone, it stays accurate even when the batter sits at different depths in the two pans, and it handles mixed units (inches and centimeters) by converting everything internally.<\/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>Baking Pan Size \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> a recipe written for a 9 \u00d7 13 in rectangular pan with the batter 2 in deep, baked instead in a 9 in round pan, also filled to 2 in.<\/p>\n<p>\\[ A_{old} = 9 \\times 13 = 117 \\ \\text{in}^2, \\quad V_{old} = 117 \\times 2 = 234 \\ \\text{in}^3 \\]<\/p>\n<p>\\[ A_{new} = \\dfrac{\\pi \\times 9^2}{4} = 63.6 \\ \\text{in}^2, \\quad V_{new} = 63.6 \\times 2 = 127.2 \\ \\text{in}^3 \\]<\/p>\n<p>\\[ k = \\dfrac{127.2}{234} = 0.544 \\]<\/p>\n<p><strong>Result:<\/strong> the scaling factor is about <strong>0.54 \u00d7<\/strong> \u2014 use roughly 54% of the recipe (a 9 in round pan holds about 8.8 cups of batter versus 16.2 cups for the 9 \u00d7 13 in pan). The remaining batter can fill a second pan or about a dozen cupcakes.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to Use the Calculator<\/h2>\n<ol>\n<li>Under <strong>Original Pan<\/strong>, choose the <strong>Shape<\/strong> the recipe was written for: round (by diameter), square (by side) or rectangle (length \u00d7 width).<\/li>\n<li>Enter the <strong>Length \/ diameter<\/strong>. For rectangles, also enter the <strong>Width<\/strong> (the width field appears automatically).<\/li>\n<li>Enter the <strong>Batter depth<\/strong> for the original pan \u2014 2 in (5 cm) is a typical cake batter depth.<\/li>\n<li>Repeat the same three steps under <strong>Replacement Pan<\/strong> for the pan you actually want to use, including the target batter depth.<\/li>\n<li>Units can be mixed freely: pick <strong>in<\/strong> or <strong>cm<\/strong> next to each field.<\/li>\n<li>Read the <strong>Scaling factor<\/strong>, the ingredient adjustment advice, and the comparison table showing base areas, volumes and cup capacities of both pans.<\/li>\n<\/ol>\n<h2>What Is Pan Conversion and Why It Matters<\/h2>\n<p>Most recipes are written for one specific pan, but real kitchens rarely have exactly that pan on hand. Baking is far less forgiving of size changes than stovetop cooking: the same batter spread thinner in a wider pan bakes faster and yields a shorter, drier cake, while batter piled deeper in a smaller pan needs more time and may overflow or stay raw in the center. Simply guessing how to adjust the recipe often leads to dry edges, sunken middles or leftover batter with nowhere to go.<\/p>\n<p>The reliable way to convert between pans is to compare <em>volumes<\/em>, not surface dimensions. A pan holds a certain amount of batter at a given depth, and the ratio of the new volume to the old volume tells you exactly how to scale the recipe. This works across shapes too: a 9 \u00d7 13 in rectangle, two 9 in rounds and a 9 in square all hold meaningfully different amounts, and the calculator accounts for the geometry automatically.<\/p>\n<p>Interpret the scaling factor directly: a factor of 1.5 means multiply every ingredient by 1.5; a factor of 0.54 means the new pan holds only about half the batter. If the factor is within about 5% of 1, the difference is small enough to ignore. Note that scaling changes the <em>amount<\/em> of batter, not the chemistry \u2014 very large scalings (beyond roughly 0.5\u20132 \u00d7) can start to affect texture because leavening and eggs don't always scale perfectly, so for extreme changes it's safer to split or double a recipe in whole batches instead.<\/p>\n<h2>Assumptions, Limitations and Practical Tips<\/h2>\n<ul>\n<li><strong>Batter depth is your choice, not the pan's height.<\/strong> Most pans can be filled higher or lower; what matters for the math is how deep the batter actually sits. Aim for pans filled half to two-thirds full.<\/li>\n<li><strong>The calculator assumes straight-sided pans.<\/strong> Angled or fluted pans (Bundt, springform with sloped walls, tart pans) hold a different volume than a straight-sided pan of the same top dimensions, so treat results for those as estimates.<\/li>\n<li><strong>Adjust bake time, not temperature.<\/strong> Keep the oven temperature as written. A shallower batter in a larger pan finishes faster \u2014 start checking a few minutes early. A deeper batter in a smaller pan needs a few extra minutes; test with a toothpick.<\/li>\n<li><strong>Handle eggs practically.<\/strong> Scale the egg count by the same factor and round to the nearest whole egg, or beat the eggs and measure out the scaled amount for better accuracy.<\/li>\n<li><strong>Capacity figures use US cups<\/strong> (1 cup \u2248 236.6 ml) and are rounded; treat them as close approximations, since measuring batter by volume is less precise than by weight.<\/li>\n<\/ul>\n<p>If you scale recipes often, consider working with weights instead of volumes: our <a href=\"https:\/\/wpcalc.com\/en\/life\/bakers-percentage-calculator\/\">Baker's Percentage Calculator<\/a> helps you express a recipe in flour-relative percentages so it can be resized to any batch size with perfect consistency. And once your cake comes out of the pan, the <a href=\"https:\/\/wpcalc.com\/en\/life\/air-fryer-cooking-conversion-calculator\/\">Air Fryer Cooking Conversion Calculator<\/a> can help adapt oven times and temperatures for smaller bakes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Convert any recipe to a different baking pan. Enter the original and replacement pan shapes, dimensions and batter depth to get a scaling factor for every ingredient.<\/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":[98],"class_list":["post-66573","post","type-post","status-publish","format-standard","hentry","category-life","tag-cooking"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/66573","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=66573"}],"version-history":[{"count":1,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/66573\/revisions"}],"predecessor-version":[{"id":66574,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/66573\/revisions\/66574"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=66573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=66573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=66573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}