{"id":16287,"date":"2026-01-26T14:10:17","date_gmt":"2026-01-26T20:10:17","guid":{"rendered":"https:\/\/blog.misumiusa.com\/?page_id=16287"},"modified":"2026-01-26T15:50:13","modified_gmt":"2026-01-26T21:50:13","slug":"copper-and-aluminum-wire-resistance-chart","status":"publish","type":"page","link":"https:\/\/us.misumi-ec.com\/blog\/copper-and-aluminum-wire-resistance-chart\/","title":{"rendered":"Copper and Aluminum Wire Resistance vs. Cross Sectional Area | Chart"},"content":{"rendered":"\n<p>The chart below compares how resistance changes with cross-sectional area for copper and aluminum. By showing the electrical resistance of copper alongside aluminium electrical resistivity, it highlights why aluminum conductors typically require a larger cross section to achieve the same performance.<\/p>\n\n\n\n<meta charset=\"UTF-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <style>\n        .wire-chart-container {\n            font-family: Arial, sans-serif;\n            max-width: 1000px;\n            margin: 0;\n            padding: 20px;\n            background-color: #ffffff;\n        }\n        \n        .wire-chart-table {\n            width: 100%;\n            border-collapse: collapse;\n            background-color: #ffffff;\n            box-shadow: 0 2px 8px rgba(0,0,0,0.1);\n        }\n        \n        .wire-chart-table thead {\n            background-color: #000000;\n            color: #ffffff;\n        }\n        \n        .wire-chart-table th {\n            padding: 15px;\n            text-align: left;\n            font-weight: 600;\n            border: 1px solid #e0e0e0;\n        }\n        \n        .wire-chart-table td {\n            padding: 12px 15px;\n            border: 1px solid #e0e0e0;\n        }\n        \n        .wire-chart-table tbody tr {\n            background-color: #ffffff;\n            transition: all 0.3s ease;\n        }\n        \n        .wire-chart-table tbody tr:nth-child(odd) {\n            background-color: #f8f8f8;\n        }\n        \n        .wire-chart-table tbody tr:hover {\n            background-color: #FFD700;\n            transform: scale(1.02);\n            box-shadow: 0 4px 12px rgba(0,0,0,0.15);\n            cursor: pointer;\n        }\n        \n        .copper-cell {\n            color: #0066CC;\n            font-weight: 500;\n        }\n        \n        .aluminum-cell {\n            color: #000000;\n            font-weight: 500;\n        }\n        \n        .area-cell {\n            font-weight: 600;\n            color: #000000;\n        }\n        \n        .unit-toggle-btn {\n            background-color: #0066CC;\n            color: #ffffff;\n            border: none;\n            padding: 6px 12px;\n            margin-left: 10px;\n            border-radius: 4px;\n            cursor: pointer;\n            font-size: 12px;\n            font-weight: 500;\n            transition: background-color 0.3s ease;\n        }\n        \n        .unit-toggle-btn:hover {\n            background-color: #FFD700;\n            color: #000000;\n        }\n        \n        .unit-toggle-btn:active {\n            transform: scale(0.95);\n        }\n        \n        .secondary-value {\n            display: none;\n            margin-top: 5px;\n            font-size: 13px;\n            color: #666;\n        }\n        \n        .secondary-value.show {\n            display: block;\n        }\n    <\/style>\n\n\n    <div class=\"wire-chart-container\">\n        <table class=\"wire-chart-table\">\n            <thead>\n                <tr>\n                    <th>\n                        Cross Sectional Area (mm\u00b2)\n                        <button class=\"unit-toggle-btn\" onclick=\"toggleAreaUnit(this)\">sq in<\/button>\n                    <\/th>\n                    <th>\n                        Copper Resistance (\u03a9\/km)\n                        <button class=\"unit-toggle-btn\" onclick=\"toggleResistanceUnit(this, 'copper')\">\u03a9\/1000ft<\/button>\n                    <\/th>\n                    <th>\n                        Aluminum Resistance (\u03a9\/km)\n                        <button class=\"unit-toggle-btn\" onclick=\"toggleResistanceUnit(this, 'aluminum')\">\u03a9\/1000ft<\/button>\n                    <\/th>\n                <\/tr>\n            <\/thead>\n            <tbody id=\"wireTableBody\">\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    <script>\n        const wireData = [\n            { area_mm2: 0.5, copper_ohm_km: 36.0, aluminum_ohm_km: 59.4 },\n            { area_mm2: 0.75, copper_ohm_km: 24.0, aluminum_ohm_km: 39.6 },\n            { area_mm2: 1.0, copper_ohm_km: 18.0, aluminum_ohm_km: 29.7 },\n            { area_mm2: 1.5, copper_ohm_km: 12.0, aluminum_ohm_km: 19.8 },\n            { area_mm2: 2.5, copper_ohm_km: 7.2, aluminum_ohm_km: 11.9 },\n            { area_mm2: 4.0, copper_ohm_km: 4.5, aluminum_ohm_km: 7.4 },\n            { area_mm2: 6.0, copper_ohm_km: 3.0, aluminum_ohm_km: 4.95 },\n            { area_mm2: 10.0, copper_ohm_km: 1.8, aluminum_ohm_km: 2.97 },\n            { area_mm2: 16.0, copper_ohm_km: 1.125, aluminum_ohm_km: 1.856 },\n            { area_mm2: 25.0, copper_ohm_km: 0.72, aluminum_ohm_km: 1.188 },\n            { area_mm2: 35.0, copper_ohm_km: 0.514, aluminum_ohm_km: 0.848 },\n            { area_mm2: 50.0, copper_ohm_km: 0.36, aluminum_ohm_km: 0.594 },\n            { area_mm2: 70.0, copper_ohm_km: 0.257, aluminum_ohm_km: 0.424 },\n            { area_mm2: 95.0, copper_ohm_km: 0.189, aluminum_ohm_km: 0.312 },\n            { area_mm2: 120.0, copper_ohm_km: 0.15, aluminum_ohm_km: 0.248 },\n            { area_mm2: 150.0, copper_ohm_km: 0.12, aluminum_ohm_km: 0.198 },\n            { area_mm2: 185.0, copper_ohm_km: 0.0973, aluminum_ohm_km: 0.161 },\n            { area_mm2: 240.0, copper_ohm_km: 0.075, aluminum_ohm_km: 0.124 },\n            { area_mm2: 300.0, copper_ohm_km: 0.06, aluminum_ohm_km: 0.099 },\n            { area_mm2: 400.0, copper_ohm_km: 0.045, aluminum_ohm_km: 0.074 },\n            { area_mm2: 500.0, copper_ohm_km: 0.036, aluminum_ohm_km: 0.059 },\n            { area_mm2: 630.0, copper_ohm_km: 0.0286, aluminum_ohm_km: 0.047 },\n            { area_mm2: 700.0, copper_ohm_km: 0.0257, aluminum_ohm_km: 0.042 }\n        ];\n\n        let showAreaSqIn = false;\n        let showCopperFt = false;\n        let showAluminumFt = false;\n\n        function mm2ToSqIn(mm2) {\n            return (mm2 * 0.00155).toFixed(6);\n        }\n\n        function ohmKmToOhm1000Ft(ohmKm) {\n            return (ohmKm * 0.3048).toFixed(4);\n        }\n\n        function toggleAreaUnit(btn) {\n            showAreaSqIn = !showAreaSqIn;\n            renderTable();\n        }\n\n        function toggleResistanceUnit(btn, type) {\n            if (type === 'copper') {\n                showCopperFt = !showCopperFt;\n            } else {\n                showAluminumFt = !showAluminumFt;\n            }\n            renderTable();\n        }\n\n        function renderTable() {\n            const tbody = document.getElementById('wireTableBody');\n            tbody.innerHTML = '';\n\n            wireData.forEach((data, index) => {\n                const row = document.createElement('tr');\n                \n                \/\/ Area cell\n                const areaCell = document.createElement('td');\n                areaCell.className = 'area-cell';\n                areaCell.innerHTML = `\n                    <div>${data.area_mm2}<\/div>\n                    <div class=\"secondary-value ${showAreaSqIn ? 'show' : ''}\">${mm2ToSqIn(data.area_mm2)} sq in<\/div>\n                `;\n                row.appendChild(areaCell);\n\n                \/\/ Copper cell\n                const copperCell = document.createElement('td');\n                copperCell.className = 'copper-cell';\n                copperCell.innerHTML = `\n                    <div>${data.copper_ohm_km}<\/div>\n                    <div class=\"secondary-value ${showCopperFt ? 'show' : ''}\">${ohmKmToOhm1000Ft(data.copper_ohm_km)} \u03a9\/1000ft<\/div>\n                `;\n                row.appendChild(copperCell);\n\n                \/\/ Aluminum cell\n                const aluminumCell = document.createElement('td');\n                aluminumCell.className = 'aluminum-cell';\n                aluminumCell.innerHTML = `\n                    <div>${data.aluminum_ohm_km}<\/div>\n                    <div class=\"secondary-value ${showAluminumFt ? 'show' : ''}\">${ohmKmToOhm1000Ft(data.aluminum_ohm_km)} \u03a9\/1000ft<\/div>\n                `;\n                row.appendChild(aluminumCell);\n\n                tbody.appendChild(row);\n            });\n        }\n\n        \/\/ Initial render\n        renderTable();\n    <\/script>\n\n\n\n<p><a href=\"https:\/\/us.misumi-ec.com\/\">MISUMI USA<\/a>&nbsp;carries a wide range of industrial manufacturing components \u2013 including&nbsp;<a href=\"https:\/\/us.misumi-ec.com\/vona2\/el_wire\/E1405000000\/E1405110000\/\">Control and Instrumentation Cables<\/a>\u2013 for your next project or machine fix. If you have any questions about measurement or sizing for your AWG needs, feel free to&nbsp;<a href=\"https:\/\/us.misumi-ec.com\/service\/info\/help-center\/product-support.html\">connect with our product experts, and engineers<\/a>. Also, if you are looking for more insights be sure to check out our other blog articles, including:&nbsp;<a href=\"https:\/\/us.misumi-ec.com\/blog\/amp-table-for-awg\/\">AMP Table for AWG<\/a>,&nbsp;<a href=\"https:\/\/us.misumi-ec.com\/blog\/awg-wire-size-table\/\">AWG Size Chart<\/a>, and more.<\/p>\n\n\n\n<p><strong>Author<\/strong>:&nbsp;<a href=\"https:\/\/us.misumi-ec.com\/blog\/author\/sbredemann\/\">Scott Bredemann<\/a>&nbsp;|&nbsp;<strong>Updated<\/strong>: 1\/26\/2026<\/p>\n\n\n\n<p class=\"has-small-font-size\"><strong>Disclaimer<\/strong>:<br>The content on this webpage is for informational purposes only. MISUMI makes no guarantees, expressed or implied, regarding the accuracy, completeness, or validity of the information. Performance parameters, tolerances, designs, materials, or processes should not be assumed to reflect third-party suppliers\u2019 or manufacturers\u2019 deliverables within MISUMI\u2019s network. Buyers are responsible for specifying their part requirements.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The chart below compares how resistance changes with cross-sectional area for copper and aluminum. By showing the electrical resistance of copper alongside aluminium electrical resistivity, it highlights why aluminum conductors typically require a larger cross section to achieve the same performance. Cross Sectional Area (mm\u00b2) sq in Copper Resistance (\u03a9\/km) \u03a9\/1000ft Aluminum Resistance (\u03a9\/km) \u03a9\/1000ft MISUMI USA&nbsp;carries a wide range [&hellip;]<\/p>\n","protected":false},"author":70,"featured_media":16303,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/pages\/16287"}],"collection":[{"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/users\/70"}],"replies":[{"embeddable":true,"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/comments?post=16287"}],"version-history":[{"count":5,"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/pages\/16287\/revisions"}],"predecessor-version":[{"id":16306,"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/pages\/16287\/revisions\/16306"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/media\/16303"}],"wp:attachment":[{"href":"https:\/\/us.misumi-ec.com\/blog\/wp-json\/wp\/v2\/media?parent=16287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}