{"id":66772,"date":"2026-10-13T08:58:08","date_gmt":"2026-10-13T05:58:08","guid":{"rendered":"https:\/\/wpcalc.com\/en\/?p=66772"},"modified":"2026-10-13T08:58:08","modified_gmt":"2026-10-13T05:58:08","slug":"electrical-resistance-unit-converter","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/converters\/electrical-resistance-unit-converter\/","title":{"rendered":"Electrical Resistance Unit Converter"},"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\">Convert Resistance Between Ohms, Kilohms and Megohms<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"66772\" data-favorite-title=\"Resistance Units\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/converters\/electrical-resistance-unit-converter\/\" data-favorite-excerpt=\"Convert electrical resistance between milliohms (m\u03a9), ohms (\u03a9), kilohms (k\u03a9), megohms (M\u03a9) and gigohms (G\u03a9). Enter a value, pick the source and target units, and get an instant, step-by-step conversion.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-physic\">\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\/converters\/electrical-resistance-unit-converter\/\" method=\"POST\" class=\"calculator\" id=\"calculator-66772\" data-post=\"66772\"><fieldset class=\"fieldset-input is-2\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field has-term\" id=\"input-1\"><label for=\"field-1\">Resistance (R)<\/label><div class=\"term\">R<\/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=\"resistance_r\" id=\"field-1\" aria-describedby=\"calc-info-1\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 4700\" min=\"0\" value=\"4700\"\/><div class=\"grid grid-cols-1\"><select id=\"field-2\" name=\"from_unit\" aria-label=\"From unit\"><option value=\"milliohm\">m\u03a9<\/option><option value=\"ohm\" selected>\u03a9<\/option><option value=\"kohm\">k\u03a9<\/option><option value=\"megohm\">M\u03a9<\/option><option value=\"gigohm\">G\u03a9<\/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-1\">Value you want to convert<\/small><\/div><div class=\"field\" id=\"input-2\"><label for=\"field-3\">Convert To<\/label><div class=\"grid grid-cols-1\"><select id=\"field-3\" name=\"convert_to\"><option value=\"milliohm\">milliohms (m\u03a9)<\/option><option value=\"ohm\">ohms (\u03a9)<\/option><option value=\"kohm\" selected>kilohms (k\u03a9)<\/option><option value=\"megohm\">megohms (M\u03a9)<\/option><option value=\"gigohm\">gigohms (G\u03a9)<\/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><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"66772\">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> Conversion Results<\/h3><div class=\"result-box\"><div class=\"field-result is-column\" id=\"output-1\"><span class=\"field-title\"><span>Converted Resistance<\/span><\/span><span class=\"field-value\" id=\"result-1\"><\/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>Value in Ohms<\/span><span class=\"result-term\">R<\/span><\/span><span class=\"field-value\" id=\"result-2\" data-unit=\"\u03a9\"><\/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>Calculation Details<\/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=\"66772\" 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>Resistance Unit Conversion 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\\[ R_{\\text{target}} = R_{\\text{source}} \\times \\frac{f_{\\text{source}}}{f_{\\text{target}}} \\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(R_{\\text{source}}\\) \u2014 the resistance value you entered, in its original unit<\/li>\n<li>\\(f_{\\text{source}}\\) \u2014 the SI multiplier of the source unit (e.g. \\(10^3\\) for k\u03a9)<\/li>\n<li>\\(f_{\\text{target}}\\) \u2014 the SI multiplier of the target unit (e.g. \\(1\\) for \u03a9)<\/li>\n<\/ul>\n<p>The formula first converts the value into base units of ohms, then divides by the target unit's multiplier. Because each unit is a standard SI prefix applied to the ohm, every conversion reduces to multiplying by a power of ten.<\/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>Resistance Units \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> a resistor is marked as 4700 \u03a9 and you want to express its resistance in kilohms.<\/p>\n<p>\\[ f_{\\text{source}} = 1, \\quad f_{\\text{target}} = 10^3 \\]<\/p>\n<p>\\[ R = 4700 \\times \\frac{1}{10^3} = 4.7\\ \\text{k\u03a9} \\]<\/p>\n<p><strong>Result:<\/strong> 4700 \u03a9 = 4.7 k\u03a9 (equivalently, 0.0047 M\u03a9).<\/p>\n<p>\n\r\n<\/section>\n<h2>How to Use the Calculator<\/h2>\n<ol>\n<li>Enter the resistance value in the <strong>Resistance (R)<\/strong> field (the default example is 4700).<\/li>\n<li>Choose the unit of that value from the <strong>From unit<\/strong> dropdown: m\u03a9, \u03a9, k\u03a9, M\u03a9 or G\u03a9.<\/li>\n<li>Select the unit you want in the <strong>Convert To<\/strong> dropdown.<\/li>\n<li>Read the <strong>Converted Resistance<\/strong> result, along with the value expressed in plain ohms and a breakdown of the calculation in <strong>Calculation Details<\/strong>.<\/li>\n<\/ol>\n<h2>What Are Resistance Units?<\/h2>\n<p>Electrical resistance measures how strongly a component opposes the flow of electric current. The SI base unit is the <strong>ohm (\u03a9)<\/strong>, defined as the resistance through which one volt drives one ampere of current: \\(1\\ \\Omega = 1\\ \\text{V\/A}\\). This relationship is the familiar form of Ohm's law, \\(R = V\/I\\), which links voltage, current and resistance in any circuit.<\/p>\n<p>Real-world resistances span an enormous range \u2014 from less than a milliohm for a thick copper bus bar to gigohms in insulation materials and precision high-value resistors. To keep the numbers readable, engineers use the standard SI prefixes: <strong>milliohm (m\u03a9)<\/strong> for very small values, <strong>kilohm (k\u03a9)<\/strong> for thousands of ohms, <strong>megohm (M\u03a9)<\/strong> for millions, and <strong>gigohm (G\u03a9)<\/strong> for billions. A 4700 \u03a9 resistor is more conveniently written as 4.7 k\u03a9, which is exactly how it appears on schematics and in component catalogues.<\/p>\n<p>Because each unit differs from the ohm only by a power of ten, converting between them is a matter of shifting the decimal point. The calculator does this instantly and also shows the intermediate value in ohms, which is useful when checking datasheets, resistor colour codes, or measurement instrument readouts that always report in base units.<\/p>\n<h2>Conversion Table<\/h2>\n<table>\n<thead>\n<tr>\n<th>Unit<\/th>\n<th>Symbol<\/th>\n<th>In ohms (\u03a9)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Milliohm<\/td>\n<td>m\u03a9<\/td>\n<td>\\(10^{-3}\\)<\/td>\n<\/tr>\n<tr>\n<td>Ohm<\/td>\n<td>\u03a9<\/td>\n<td>\\(1\\)<\/td>\n<\/tr>\n<tr>\n<td>Kilohm<\/td>\n<td>k\u03a9<\/td>\n<td>\\(10^{3}\\)<\/td>\n<\/tr>\n<tr>\n<td>Megohm<\/td>\n<td>M\u03a9<\/td>\n<td>\\(10^{6}\\)<\/td>\n<\/tr>\n<tr>\n<td>Gigohm<\/td>\n<td>G\u03a9<\/td>\n<td>\\(10^{9}\\)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Assumptions, Limitations and Tips<\/h2>\n<ul>\n<li>The calculator accepts non-negative values only. Negative resistances do not exist as passive physical quantities, so an entry below zero is rejected.<\/li>\n<li>Only the five units shown are supported. Related quantities such as conductance (siemens), resistivity (\u03a9\u00b7m) or impedance involve different dimensions and cannot be converted with a simple prefix.<\/li>\n<li>Very large or very small results are displayed in scientific notation for readability; you can safely copy them into reports or spreadsheets.<\/li>\n<li>When reading resistor labels, note the shorthand convention: \"4k7\" means 4.7 k\u03a9 and \"1M\" means 1 M\u03a9 \u2014 convert carefully to avoid a factor-of-1000 error.<\/li>\n<li>For context in practical electronics, resistance combines with voltage and current through Ohm's law; if you also work with electrical power, our <a href=\"https:\/\/wpcalc.com\/en\/converters\/power-unit-converter\/\">Power Units converter<\/a> handles watts, kilowatts and related units. Battery specifications often pair resistance with capacity \u2014 see the <a href=\"https:\/\/wpcalc.com\/en\/converters\/battery-mah-to-wh-converter\/\">mAh to Wh converter<\/a> \u2014 and signal work may benefit from the <a href=\"https:\/\/wpcalc.com\/en\/converters\/data-transfer-rate-converter-mbps-to-mb-s\/\">Data Transfer Rate converter<\/a>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Convert electrical resistance between milliohms (m\u03a9), ohms (\u03a9), kilohms (k\u03a9), megohms (M\u03a9) and gigohms (G\u03a9). Enter a value, pick the source and target units, and get an instant, step-by-step conversion.<\/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":[3],"tags":[34],"class_list":["post-66772","post","type-post","status-publish","format-standard","hentry","category-converters","tag-physics-units"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/66772","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=66772"}],"version-history":[{"count":2,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/66772\/revisions"}],"predecessor-version":[{"id":67032,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/66772\/revisions\/67032"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=66772"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=66772"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=66772"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}