{"id":259771,"date":"2025-06-24T17:04:01","date_gmt":"2025-06-24T22:04:01","guid":{"rendered":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/"},"modified":"2026-05-11T09:46:22","modified_gmt":"2026-05-11T14:46:22","slug":"area-of-a-circle-calculator","status":"publish","type":"page","link":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/","title":{"rendered":"Area of a Circle Calculator"},"content":{"rendered":"<div class=\"calculatorcontainer\" id=\"circleCalculator\" style=\"margin-top: -2em\">\n<div class=\"background\">\n<div class=\"titleIntroCombo\">\n<div id=\"title\" style=\"font-weight: 500\">Circle Calculator<\/div>\n<div id=\"intro\">Enter any value to calculate the others<\/div>\n<\/div>\n<div id=\"inputFields\">\n<div class=\"labelInputCombo\"><label for=\"radiusInput\">Radius<\/label><input onkeyup=\"calculateCircle(event)\" id=\"radiusInput\" placeholder=\"r\" type=\"text\" \/><\/p>\n<div><select onchange=\"calculateCircle(event)\" id=\"radiusDropdown\" data-unit=\"m\"><option value=\"mm\">mm<\/option><option value=\"cm\">cm<\/option><option value=\"m\" selected=\"selected\">m<\/option><option value=\"km\">km<\/option><option value=\"in\">in<\/option><option value=\"ft\">ft<\/option><option value=\"yd\">yd<\/option><option value=\"mi\">mi<\/option><\/select><\/div>\n<\/div>\n<div class=\"labelInputCombo\"><label for=\"diameterInput\">Diameter<\/label><input onkeyup=\"calculateCircle(event)\" id=\"diameterInput\" placeholder=\"d\" type=\"text\" \/><\/p>\n<div><select onchange=\"calculateCircle(event)\" id=\"diameterDropdown\" data-unit=\"m\"><option value=\"mm\">mm<\/option><option value=\"cm\">cm<\/option><option value=\"m\" selected=\"selected\">m<\/option><option value=\"km\">km<\/option><option value=\"in\">in<\/option><option value=\"ft\">ft<\/option><option value=\"yd\">yd<\/option><option value=\"mi\">mi<\/option><\/select><\/div>\n<\/div>\n<div class=\"labelInputCombo\"><label for=\"circumferenceInput\">Circumference<\/label><input onkeyup=\"calculateCircle(event)\" id=\"circumferenceInput\" placeholder=\"C\" type=\"text\" \/><\/p>\n<div><select onchange=\"calculateCircle(event)\" id=\"circumferenceDropdown\" data-unit=\"m\"><option value=\"mm\">mm<\/option><option value=\"cm\">cm<\/option><option value=\"m\" selected=\"selected\">m<\/option><option value=\"km\">km<\/option><option value=\"in\">in<\/option><option value=\"ft\">ft<\/option><option value=\"yd\">yd<\/option><option value=\"mi\">mi<\/option><\/select><\/div>\n<\/div>\n<div class=\"labelInputCombo\"><label for=\"areaInput\">Area<\/label><input onkeyup=\"calculateCircle(event)\" id=\"areaInput\" placeholder=\"A\" type=\"text\" \/><\/p>\n<div><select onchange=\"calculateCircle(event)\" id=\"areaDropdown\" data-unit=\"m2\"><option value=\"mm2\">mm\u00b2<\/option><option value=\"cm2\">cm\u00b2<\/option><option value=\"m2\" selected=\"selected\">m\u00b2<\/option><option value=\"km2\">km\u00b2<\/option><option value=\"in2\">in\u00b2<\/option><option value=\"ft2\">ft\u00b2<\/option><option value=\"yd2\">yd\u00b2<\/option><option value=\"mi2\">mi\u00b2<\/option><\/select><\/div>\n<\/div>\n<div class=\"reset\"><button class=\"reset\" onclick=\"clearForm()\" data-uw-rm-kbnav=\"click\">Reset<\/button><\/div>\n<\/div>\n<\/div>\n<div id=\"bugLink\" style=\"text-align: center; margin-bottom: 20px; font-size: 80%\"> Found a bug? <a class=\"ylist\" href=\"https:\/\/airtable.com\/appgcc1PP0BbzPCbI\/shrb33jgGwb66DWHC?prefill_Test=Area%20Of%20A%20Circle%20Calculator&#038;prefill_Question+Number=0&#038;prefill_Which+Form=Calculator-Feedback&#038;prefill_UP-ID=Calculator-Feedback%20-%20Area%20Of%20A%20Circle%20Calculator%20-%200&#038;hide_Test=true&#038;hide_Which+Form=true&#038;hide_UP-ID=true&#038;hide_Question+Number=true\" target=\"_blank\" rel=\"noopener\" >Let us know!<\/a ><\/div>\n<\/div>\n<p>Knowing how to solve for the area, circumference, diameter, and radius of a circle is an important math concept to understand. Take a look at the examples below to see how each is calculated.<\/p>\n<h2 class=\"pt-page\"><span id=\"Formulas\" class=\"m-toc-anchor\"><\/span>Formulas<\/h2>\n<h3><span id=\"Diameter_and_Radius\" class=\"m-toc-anchor\"><\/span>Diameter and Radius<\/h3>\n<p>The diameter (\\(d\\)) is the distance straight across a circle. The radius (\\(r\\)) is the distance from the center of a circle to any point on the circle&#8217;s edge.<\/p>\n<p>It&#8217;s important to note that the radius is always half the length of the diameter.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Circle-with-diameter-and-radius-marked.svg\" alt=\"Circle with diameter and radius marked\" width=\"129\" height=\"129\" class=\"aligncenter size-full wp-image-267598 desktop-only\"  role=\"img\" style=\"float: right; margin-right: 5.5em; margin-top: -0.8em\" \/><\/p>\n<ul>\n<li style=\"margin-bottom: 1em\">To find the radius from the diameter: \\(r=\\dfrac{d}{2}\\)<\/li>\n<li>To find the diameter from the radius: \\(d=2r\\)<\/li>\n<\/ul>\n<h3><span id=\"Circumference_and_Area\" class=\"m-toc-anchor\"><\/span>Circumference and Area<\/h3>\n<p>The circumference (\\(C\\)) is the distance around the <em>outside<\/em> of a circle. The area (\\(A\\)) is the total space <em>inside<\/em> the circle.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Circle-area-and-circumference.svg\" alt=\"Circle with area and circumference marked\" width=\"129\" height=\"146\" class=\"aligncenter size-full wp-image-267904 desktop-only\"  role=\"img\" style=\"float: right; margin-right: 5.5em; margin-top: -2em; margin-bottom: 0em;\" \/><\/p>\n<ul>\n<li style=\"margin-bottom: 1em\">Circumference formula: \\(C=2\\pi r\\) or \\(C=\\pi d\\)<\/li>\n<li>Area formula: \\(A=\\pi r^2\\)<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2 class=\"pt-page\"><span id=\"Example_Problems\" class=\"m-toc-anchor\"><\/span>Example Problems<\/h2>\n<h3><span id=\"Diameter\" class=\"m-toc-anchor\"><\/span>Diameter<\/h3>\n<div class=\"bulb-callout\"><span class=\"bulb-callout-icon\">\ud83d\udca1<\/span><span class=\"bulb-callout-text\">What is the diameter of a circle with an area of 49\\(\u03c0\\) ft<sup>2<\/sup>?<\/span><\/div>\n<p>To solve this, we need to work backward from the area to find the radius.<\/p>\n<p>First, we need to plug our area (49\u03c0) into the area formula and solve for \\(r\\).<\/p>\n<div style=\"text-align: center; line-height: 35px\">\\(A=\\pi r^2\\)<br \/>\n\\(49\\pi =\\pi r^2\\)<\/p>\n<p style=\"margin-bottom: 0.75em; margin-top: -0.5em\">\\(\\dfrac{49\\pi}{\\pi}=\\dfrac{\\pi r^2}{\\pi}\\)<\/p>\n<p>\\(49 = r^2\\)<br \/>\n\\(r = 7\\)\n<\/p><\/div>\n<p>We now know that the radius is 7 feet. Using out formula above (\\(d=2r\\)), we can use the radius to find the diameter.<\/p>\n<p style=\"text-align: center\">\\(d=2\\times 7=14\\)<\/p>\n<p>The diameter of the circle is 14 feet!<\/p>\n<h3><span id=\"Radius\" class=\"m-toc-anchor\"><\/span>Radius<\/h3>\n<div class=\"bulb-callout\"><span class=\"bulb-callout-icon\">\ud83d\udca1<\/span><span class=\"bulb-callout-text\">A bicycle wheel travels 30\\(\u03c0\\) inches in one full rotation. What is its radius?<\/span><\/div>\n<p>The distance of one full rotation is the same as the circumference. Therefore, we know the circumference of the wheel is 30\\(\u03c0\\) inches.<\/p>\n<p>First, we need to plug the circumference of the wheel into the circumference formula and solve for \\(r\\).<\/p>\n<div style=\"text-align: center; line-height: 35px\">\\(C=2 \\pi r\\)<br \/>\n\\(30\\pi =2 \\pi r\\)<\/p>\n<p style=\"margin-top: -0.5em\">\\(r= \\dfrac{30\\pi}{2 \\pi}=15\\)<\/p>\n<\/div>\n<p>We now know that the radius is 15 inches!<\/p>\n<h3><span id=\"Area\" class=\"m-toc-anchor\"><\/span>Area<\/h3>\n<div class=\"bulb-callout\"><span class=\"bulb-callout-icon\">\ud83d\udca1<\/span><span class=\"bulb-callout-text\">The diameter of a circle is 18 inches. What is its area?<\/span><\/div>\n<p>The area formula requires the radius, so we need to find that first using the diameter.<\/p>\n<div style=\"text-align: center; line-height: 35px\">\\(r=\\dfrac{d}{2}\\rightarrow r=\\dfrac{18}{2}=9\\)\n<\/div>\n<p>&nbsp;<br \/>\nNow, we can use the radius to find the area.<\/p>\n<div style=\"text-align: center; line-height: 30px\">\\(A=\\pi r^2 \\rightarrow A=\\pi (9)^2 = 81\\pi \\text{ in}^2\\)\n<\/div>\n<p>&nbsp;<br \/>\nWe now know that the area of the circle is 81\u03c0 in<sup>2<\/sup>!<\/p>\n<h3><span id=\"Circumference\" class=\"m-toc-anchor\"><\/span>Circumference<\/h3>\n<div class=\"bulb-callout\"><span class=\"bulb-callout-icon\">\ud83d\udca1<\/span><span class=\"bulb-callout-text\">A circle has an area of 100\\(\u03c0\\) yd<sup>2<\/sup>. What is the circumference?<\/span><\/div>\n<p>First, we need to find the radius from the area.<\/p>\n<div style=\"text-align: center; line-height: 35px\">\\(A=\\pi r^2 \\rightarrow 100\\pi = \\pi r^2\\)<br \/>\n\\(r^2=100 \\rightarrow r=10\\text{ yd}\\)\n<\/div>\n<p>&nbsp;<br \/>\nThen, use the radius to find the circumference.<\/p>\n<div style=\"text-align: center; line-height: 30px\">\\(C=2\\pi r \\rightarrow C= 2\\pi (10) = 20\\pi\\)\n<\/div>\n<p>&nbsp;<br \/>\nWe now know that the circumference is 20\\(\u03c0\\) yards!<\/p>\n<div class=\"home-buttons2\">\n<p><a href=\"https:\/\/www.mometrix.com\/academy\/the-diameter-radius-and-circumference-of-circles\/\">Learn More About Circle Measurements Here!<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Circle Calculator Enter any value to calculate the others Radius mmcmmkminftydmi Diameter mmcmmkminftydmi Circumference mmcmmkminftydmi Area mm\u00b2cm\u00b2m\u00b2km\u00b2in\u00b2ft\u00b2yd\u00b2mi\u00b2 Reset Found a bug? Let us know! Knowing how to solve for the area, circumference, diameter, and radius of a circle is an important math concept to understand. Take a look at the examples below to see how &#8230; <a title=\"Area of a Circle Calculator\" class=\"read-more\" href=\"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/\" aria-label=\"Read more about Area of a Circle Calculator\">Read more<\/a><\/p>\n","protected":false},"author":79,"featured_media":268027,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-259771","page","type-page","status-publish","has-post-thumbnail"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Calculate the area of a circle instantly using radius or diameter with a free circle area calculator, formulas, \u03c0 examples, and step-by-step geometry solutions.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO Pro (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"|\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Area of a Circle Calculator | Formula, Radius &amp; Diameter Solver\" \/>\n\t\t<meta property=\"og:description\" content=\"Calculate the area of a circle instantly using radius or diameter with a free circle area calculator, formulas, \u03c0 examples, and step-by-step geometry solutions.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Area-of-a-Circle-Calculator-scaled.webp\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Area-of-a-Circle-Calculator-scaled.webp\" \/>\n\t\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t\t<meta property=\"og:image:height\" content=\"1344\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2025-06-24T22:04:01+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-05-11T14:46:22+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Area of a Circle Calculator | Formula, Radius &amp; Diameter Solver\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Calculate the area of a circle instantly using radius or diameter with a free circle area calculator, formulas, \u03c0 examples, and step-by-step geometry solutions.\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Area-of-a-Circle-Calculator-scaled.webp\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/area-of-a-circle-calculator\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.mometrix.com\\\/academy\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/area-of-a-circle-calculator\\\/#listItem\",\"name\":\"Area of a Circle Calculator\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/area-of-a-circle-calculator\\\/#listItem\",\"position\":2,\"name\":\"Area of a Circle Calculator\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy#listItem\",\"name\":\"Home\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/#organization\",\"url\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/wp-content\\\/uploads\\\/2022\\\/06\\\/Mometrix-Test-Prep-Logo-min.png\",\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/area-of-a-circle-calculator\\\/#organizationLogo\",\"width\":557,\"height\":242,\"caption\":\"Mometrix Test Preparation logo\"},\"image\":{\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/area-of-a-circle-calculator\\\/#organizationLogo\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/area-of-a-circle-calculator\\\/#webpage\",\"url\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/area-of-a-circle-calculator\\\/\",\"name\":\"Area of a Circle Calculator | Formula, Radius & Diameter Solver\",\"description\":\"Calculate the area of a circle instantly using radius or diameter with a free circle area calculator, formulas, \\u03c0 examples, and step-by-step geometry solutions.\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/area-of-a-circle-calculator\\\/#breadcrumblist\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/Area-of-a-Circle-Calculator-scaled.webp\",\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/area-of-a-circle-calculator\\\/#mainImage\",\"width\":2560,\"height\":1344,\"caption\":\"A hand presses a button on a calculator next to the text \\\"Mometrix Area of a Circle Calculator\\\" on a yellow background.\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/area-of-a-circle-calculator\\\/#mainImage\"},\"datePublished\":\"2025-06-24T17:04:01-05:00\",\"dateModified\":\"2026-05-11T09:46:22-05:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/#website\",\"url\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.mometrix.com\\\/academy\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO Pro -->\r\n\t\t<title>Area of a Circle Calculator | Formula, Radius &amp; Diameter Solver<\/title>\n\n","aioseo_head_json":{"title":"Area of a Circle Calculator | Formula, Radius & Diameter Solver","description":"Calculate the area of a circle instantly using radius or diameter with a free circle area calculator, formulas, \u03c0 examples, and step-by-step geometry solutions.","canonical_url":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/www.mometrix.com\/academy#listItem","position":1,"name":"Home","item":"https:\/\/www.mometrix.com\/academy","nextItem":{"@type":"ListItem","@id":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/#listItem","name":"Area of a Circle Calculator"}},{"@type":"ListItem","@id":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/#listItem","position":2,"name":"Area of a Circle Calculator","previousItem":{"@type":"ListItem","@id":"https:\/\/www.mometrix.com\/academy#listItem","name":"Home"}}]},{"@type":"Organization","@id":"https:\/\/www.mometrix.com\/academy\/#organization","url":"https:\/\/www.mometrix.com\/academy\/","logo":{"@type":"ImageObject","url":"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2022\/06\/Mometrix-Test-Prep-Logo-min.png","@id":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/#organizationLogo","width":557,"height":242,"caption":"Mometrix Test Preparation logo"},"image":{"@id":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/#organizationLogo"}},{"@type":"WebPage","@id":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/#webpage","url":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/","name":"Area of a Circle Calculator | Formula, Radius & Diameter Solver","description":"Calculate the area of a circle instantly using radius or diameter with a free circle area calculator, formulas, \u03c0 examples, and step-by-step geometry solutions.","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/www.mometrix.com\/academy\/#website"},"breadcrumb":{"@id":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/#breadcrumblist"},"image":{"@type":"ImageObject","url":"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Area-of-a-Circle-Calculator-scaled.webp","@id":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/#mainImage","width":2560,"height":1344,"caption":"A hand presses a button on a calculator next to the text \"Mometrix Area of a Circle Calculator\" on a yellow background."},"primaryImageOfPage":{"@id":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/#mainImage"},"datePublished":"2025-06-24T17:04:01-05:00","dateModified":"2026-05-11T09:46:22-05:00"},{"@type":"WebSite","@id":"https:\/\/www.mometrix.com\/academy\/#website","url":"https:\/\/www.mometrix.com\/academy\/","inLanguage":"en-US","publisher":{"@id":"https:\/\/www.mometrix.com\/academy\/#organization"}}]},"og:locale":"en_US","og:site_name":"|","og:type":"article","og:title":"Area of a Circle Calculator | Formula, Radius &amp; Diameter Solver","og:description":"Calculate the area of a circle instantly using radius or diameter with a free circle area calculator, formulas, \u03c0 examples, and step-by-step geometry solutions.","og:url":"https:\/\/www.mometrix.com\/academy\/area-of-a-circle-calculator\/","og:image":"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Area-of-a-Circle-Calculator-scaled.webp","og:image:secure_url":"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Area-of-a-Circle-Calculator-scaled.webp","og:image:width":"2560","og:image:height":"1344","article:published_time":"2025-06-24T22:04:01+00:00","article:modified_time":"2026-05-11T14:46:22+00:00","twitter:card":"summary_large_image","twitter:title":"Area of a Circle Calculator | Formula, Radius &amp; Diameter Solver","twitter:description":"Calculate the area of a circle instantly using radius or diameter with a free circle area calculator, formulas, \u03c0 examples, and step-by-step geometry solutions.","twitter:image":"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Area-of-a-Circle-Calculator-scaled.webp"},"aioseo_meta_data":{"post_id":"259771","title":"Area of a Circle Calculator | Formula, Radius &amp; Diameter Solver","description":"Calculate the area of a circle instantly using radius or diameter with a free circle area calculator, formulas, \u03c0 examples, and step-by-step geometry solutions.","keywords":null,"keyphrases":{"focus":{"keyphrase":"","score":0,"analysis":{"keyphraseInTitle":{"score":0,"maxScore":9,"error":1}}},"additional":[]},"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"featured","og_image_url":"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Area-of-a-Circle-Calculator-scaled.webp","og_image_width":"2560","og_image_height":"1344","og_image_custom_url":null,"og_image_custom_fields":null,"og_video":"","og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"featured","twitter_image_url":"https:\/\/www.mometrix.com\/academy\/wp-content\/uploads\/2025\/09\/Area-of-a-Circle-Calculator-scaled.webp","twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"WebPage","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":"-1","robots_max_videopreview":"-1","robots_max_imagepreview":"large","priority":null,"frequency":"default","location":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"open_ai":"{\"title\":{\"suggestions\":[],\"usage\":0},\"description\":{\"suggestions\":[],\"usage\":0}}","ai":{"faqs":[],"keyPoints":[],"schemas":[],"titles":[],"descriptions":[],"socialPosts":{"email":[],"linkedin":[],"twitter":[],"facebook":[],"instagram":[]}},"created":"2025-06-24 22:03:03","updated":"2026-05-11 15:42:39"},"_links":{"self":[{"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/pages\/259771","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/users\/79"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/comments?post=259771"}],"version-history":[{"count":6,"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/pages\/259771\/revisions"}],"predecessor-version":[{"id":291992,"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/pages\/259771\/revisions\/291992"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/media\/268027"}],"wp:attachment":[{"href":"https:\/\/www.mometrix.com\/academy\/wp-json\/wp\/v2\/media?parent=259771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}