{"id":9647,"date":"2025-06-19T08:53:16","date_gmt":"2025-06-19T00:53:16","guid":{"rendered":"https:\/\/totcables.com\/?p=9647"},"modified":"2025-06-19T10:57:38","modified_gmt":"2025-06-19T02:57:38","slug":"wire-size-calculator-find-the-right-electrical-wire-gauge","status":"publish","type":"post","link":"https:\/\/totcables.com\/?p=9647","title":{"rendered":"Wire Size Calculator \u2013 Find the Right Electrical Wire Gauge"},"content":{"rendered":"<p>{&#8220;main-title&#8221;:{&#8220;component&#8221;:&#8221;hc_title&#8221;,&#8221;id&#8221;:&#8221;main-title&#8221;,&#8221;title&#8221;:&#8221;&#8221;,&#8221;subtitle&#8221;:&#8221;Choosing the correct wire size is one of the most important decisions in any electrical installation. Using the wrong wire gauge can lead to overheating, voltage drop, or even electrical fires. That&#8217;s why electricians, engineers, and DIY installers use a wire size calculator to select the correct wire gauge based on current, voltage, distance, and material.&#8221;,&#8221;title_content&#8221;:{&#8220;component&#8221;:&#8221;hc_title_image&#8221;,&#8221;id&#8221;:&#8221;title-image&#8221;,&#8221;image&#8221;:&#8221;https:\/\/totcables.com\/wp-content\/uploads\/2025\/06\/Wire-Size-Calculator.jpg|453|700|9674&#8243;,&#8221;full_screen&#8221;:false,&#8221;full_screen_height&#8221;:&#8221;&#8221;,&#8221;parallax&#8221;:false,&#8221;bleed&#8221;:&#8221;&#8221;,&#8221;ken_burn&#8221;:&#8221;&#8221;,&#8221;overlay&#8221;:&#8221;transparent-dark&#8221;,&#8221;breadcrumbs&#8221;:true,&#8221;white&#8221;:true,&#8221;position&#8221;:&#8221;&#8221;}},&#8221;section_5ZtkF&#8221;:{&#8220;component&#8221;:&#8221;hc_section&#8221;,&#8221;id&#8221;:&#8221;section_5ZtkF&#8221;,&#8221;section_width&#8221;:&#8221;&#8221;,&#8221;animation&#8221;:&#8221;&#8221;,&#8221;animation_time&#8221;:&#8221;&#8221;,&#8221;timeline_animation&#8221;:&#8221;&#8221;,&#8221;timeline_delay&#8221;:&#8221;&#8221;,&#8221;timeline_order&#8221;:&#8221;&#8221;,&#8221;vertical_row&#8221;:&#8221;&#8221;,&#8221;box_middle&#8221;:&#8221;&#8221;,&#8221;css_classes&#8221;:&#8221;&#8221;,&#8221;custom_css_classes&#8221;:&#8221;&#8221;,&#8221;custom_css_styles&#8221;:&#8221;&#8221;,&#8221;section_content&#8221;:[{&#8220;component&#8221;:&#8221;hc_column&#8221;,&#8221;id&#8221;:&#8221;column_1Tqv5&#8243;,&#8221;column_width&#8221;:&#8221;col-md-12&#8243;,&#8221;animation&#8221;:&#8221;&#8221;,&#8221;animation_time&#8221;:&#8221;&#8221;,&#8221;timeline_animation&#8221;:&#8221;&#8221;,&#8221;timeline_delay&#8221;:&#8221;&#8221;,&#8221;timeline_order&#8221;:&#8221;&#8221;,&#8221;css_classes&#8221;:&#8221;&#8221;,&#8221;custom_css_classes&#8221;:&#8221;&#8221;,&#8221;custom_css_styles&#8221;:&#8221;&#8221;,&#8221;main_content&#8221;:[{&#8220;component&#8221;:&#8221;hc_wp_editor&#8221;,&#8221;id&#8221;:&#8221;rW4X2&#8243;,&#8221;css_classes&#8221;:&#8221;&#8221;,&#8221;custom_css_classes&#8221;:&#8221;&#8221;,&#8221;custom_css_styles&#8221;:&#8221;&#8221;,&#8221;editor_content&#8221;:&#8221;<\/p>\n<div class='omni-calculator' data-parsed='1' style='visibility: visible; opacity: 1; box-sizing: border-box; background: rgb(255, 255, 255); border-radius: 8px; width: 400px; overflow: hidden;'>\\n    <a href='https:\/\/www.omnicalculator.com\/physics\/wire-size' class='omni-calculator-link' data-target='true' style='visibility: visible; opacity: 1; box-sizing: border-box; border: 0px; box-shadow: none; display: block; width: 184px; height: 40px; margin: 0px 0px 0px auto; padding: 20px 12px 4px; text-decoration: none;'>\\n      <img alt='Omni Calculator' class='omni-calculator-logo' src='https:\/\/cdn.omnicalculator.com\/embed\/omni-calculator.svg' style='visibility: visible; opacity: 1; box-sizing: border-box; display: block; width: 100%;'>\\n    <\/a><iframe class='omni-calculator-frame' data-calculator-id='1' src='https:\/\/www.omnicalculator.com\/physics\/wire-size\/embed#id=1' style='visibility: visible; opacity: 1; box-sizing: border-box; border: none; display: block; height: 1174.39px; margin: 0px; padding: 0px; width: 100%;'><\/iframe>\\n  <\/div>\n<p>\\n  <script async='' src='https:\/\/www.omnicalculator.com\/embed.js'><\/script>&#8220;}]},{&#8220;component&#8221;:&#8221;hc_column&#8221;,&#8221;id&#8221;:&#8221;column_o2Xkn&#8221;,&#8221;column_width&#8221;:&#8221;col-md-12&#8243;,&#8221;animation&#8221;:&#8221;&#8221;,&#8221;animation_time&#8221;:&#8221;&#8221;,&#8221;timeline_animation&#8221;:&#8221;&#8221;,&#8221;timeline_delay&#8221;:&#8221;&#8221;,&#8221;timeline_order&#8221;:&#8221;&#8221;,&#8221;css_classes&#8221;:&#8221;&#8221;,&#8221;custom_css_classes&#8221;:&#8221;&#8221;,&#8221;custom_css_styles&#8221;:&#8221;&#8221;,&#8221;main_content&#8221;:[{&#8220;component&#8221;:&#8221;hc_wp_editor&#8221;,&#8221;id&#8221;:&#8221;ZsSEu&#8221;,&#8221;css_classes&#8221;:&#8221;&#8221;,&#8221;custom_css_classes&#8221;:&#8221;&#8221;,&#8221;custom_css_styles&#8221;:&#8221;&#8221;,&#8221;editor_content&#8221;:&#8221;<\/p>\n<h2 data-start='55' data-end='87'>\ud83d\udd27 How to Calculate Wire Size<\/h2>\n<p>\\n<\/p>\n<p data-start='89' data-end='400'>The <strong data-start='93' data-end='123'>size of an electrical wire<\/strong> refers to its <strong data-start='138' data-end='162'>cross-sectional area<\/strong>\u2014typically measured in square millimeters (mm\u00b2) or American Wire Gauge (AWG). A larger wire allows more current to pass with less resistance and lower voltage drop, just like a wider pipe allows more water to flow with less pressure loss.<\/p>\n<p>\\n\\n<\/p>\n<h3 data-start='402' data-end='437'>\u2699\ufe0f Key Electrical Laws Involved<\/h3>\n<p>\\n<\/p>\n<p data-start='439' data-end='483'>To calculate the required wire size, we use:<\/p>\n<p>\\n\\n<\/p>\n<ul data-start='485' data-end='603'>\\n \\t<\/p>\n<li data-start='485' data-end='522'>\\n\n<p data-start='487' data-end='503'><strong data-start='487' data-end='500'>Ohm\u2019s Law<\/strong>:<\/p>\n<p>\\n\\n<span class='katex-display'><span class='katex'><span class='katex-mathml'>V=IRV = IR<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>V<\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord mathnormal'>I<\/span><span class='mord mathnormal'>R<\/span><\/span><\/span><\/span><\/span><\/li>\n<p>\\n \\t<\/p>\n<li data-start='524' data-end='603'>\\n\n<p data-start='526' data-end='574'><strong data-start='526' data-end='544'>Pouillet\u2019s Law<\/strong> (for resistance of a wire):<\/p>\n<p>\\n\\n<span class='katex-display'><span class='katex'><span class='katex-mathml'>R=\u03c1LAR = \\\\frac{\u03c1L}{A}<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>R<\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'><span class='mfrac'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='mord mathnormal'>A<\/span><span class='mord mathnormal'>\u03c1<\/span><span class='mord mathnormal'>L<\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/li>\n<p>\\n<\/ul>\n<p>\\n<\/p>\n<p data-start='605' data-end='611'>Where:<\/p>\n<p>\\n\\n<\/p>\n<ul data-start='612' data-end='864'>\\n \\t<\/p>\n<li data-start='612' data-end='649'>\\n\n<p data-start='614' data-end='649'><span class='katex'><span class='katex-mathml'>VV<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>V<\/span><\/span><\/span><\/span> = Voltage drop (in volts)<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='650' data-end='684'>\\n\n<p data-start='652' data-end='684'><span class='katex'><span class='katex-mathml'>II<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>I<\/span><\/span><\/span><\/span> = Current (in amperes)<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='685' data-end='724'>\\n\n<p data-start='687' data-end='724'><span class='katex'><span class='katex-mathml'>RR<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>R<\/span><\/span><\/span><\/span> = Wire resistance (in ohms)<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='725' data-end='777'>\\n\n<p data-start='727' data-end='777'><span class='katex'><span class='katex-mathml'>\u03c1\u03c1<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>\u03c1<\/span><\/span><\/span><\/span> = Resistivity of the wire material (\u03a9\u00b7m)<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='778' data-end='823'>\\n\n<p data-start='780' data-end='823'><span class='katex'><span class='katex-mathml'>LL<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>L<\/span><\/span><\/span><\/span> = One-way wire length (in meters)<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='824' data-end='864'>\\n\n<p data-start='826' data-end='864'><span class='katex'><span class='katex-mathml'>AA<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>A<\/span><\/span><\/span><\/span> = Cross-sectional area (in m\u00b2)<\/p>\n<p>\\n<\/li>\n<p>\\n<\/ul>\n<p>\\n<\/p>\n<h3 data-start='866' data-end='903'>\ud83e\uddee Formula to Calculate Wire Size<\/h3>\n<p>\\n<\/p>\n<h4 data-start='905' data-end='945'>\ud83d\udcd8 For Single-phase or DC Circuits:<\/h4>\n<p>\\n<\/p>\n<p data-start='224' data-end='587'><span class='katex-display'><span class='katex'><span class='katex-mathml'>A=2\u22c5\u03c1\u22c5I\u22c5LVA = \\\\frac{2 \\\\cdot \u03c1 \\\\cdot I \\\\cdot L}{V}<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>A<\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'><span class='mfrac'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='mord mathnormal'>V<\/span>2<span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>\u03c1<\/span><span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>I<\/span><span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>L<\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\\n\\n<\/p>\n<h4 data-start='994' data-end='1030'>\ud83d\udcd8 For Three-phase AC Circuits:<\/h4>\n<p>\\n<\/p>\n<p data-start='224' data-end='587'><span class='katex-display'><span class='katex'><span class='katex-mathml'>A=3\u22c5\u03c1\u22c5I\u22c5LVA = \\\\frac{\\\\sqrt{3} \\\\cdot \u03c1 \\\\cdot I \\\\cdot L}{V}<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>A<\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'><span class='mfrac'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='mord mathnormal'>V<\/span><span class='mord sqrt'><span class='svg-align'>3<\/span><span class='vlist-s'>\u200b<\/span><\/span><span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>\u03c1<\/span><span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>I<\/span><span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>L<\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\\n\\n<\/p>\n<ul data-start='1086' data-end='1259'>\\n \\t<\/p>\n<li data-start='1086' data-end='1187'>\\n\n<p data-start='1088' data-end='1187'>Multiply the result by <strong data-start='1111' data-end='1124'>1,000,000<\/strong> to convert square meters (m\u00b2) to <strong data-start='1158' data-end='1186'>square millimeters (mm\u00b2)<\/strong>.<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1188' data-end='1259'>\\n\n<p data-start='1190' data-end='1259'>Always <strong data-start='1197' data-end='1247'>round up to the next larger standard wire size<\/strong> for safety.<\/p>\n<p>\\n<\/li>\n<p>\\n<\/ul>\n<p>\\n\\n<\/p>\n<hr data-start='1261' data-end='1264'>\\n\\n<\/p>\n<h2 data-start='1266' data-end='1298'>\ud83c\udf21\ufe0f Adjusting for Temperature<\/h2>\n<p>\\n<\/p>\n<p data-start='1300' data-end='1350'>Resistivity <span class='katex'><span class='katex-mathml'>\u03c1\u03c1<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>\u03c1<\/span><\/span><\/span><\/span> changes with temperature. Use:<\/p>\n<p>\\n<\/p>\n<p data-start='224' data-end='587'><span class='katex-display'><span class='katex'><span class='katex-mathml'>\u03c12=\u03c11(1+\u03b1(t2\u2212t1))\u03c1_2 = \u03c1_1(1 + \u03b1(t_2 &#8211; t_1))<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord'><span class='mord mathnormal'>\u03c1<\/span><span class='msupsub'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>2<\/span><\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'><span class='mord mathnormal'>\u03c1<\/span><span class='msupsub'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>1<\/span><\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><span class='mopen'>(<\/span><span class='mord'>1<\/span><span class='mbin'>+<\/span><\/span><span class='base'><span class='mord mathnormal'>\u03b1<\/span><span class='mopen'>(<\/span><span class='mord'><span class='mord mathnormal'>t<\/span><span class='msupsub'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>2<\/span><\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><span class='mbin'>\u2212<\/span><\/span><span class='base'><span class='mord'><span class='mord mathnormal'>t<\/span><span class='msupsub'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>1<\/span><\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><span class='mclose'>))<\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\\n<\/p>\n<p data-start='1387' data-end='1393'>Where:<\/p>\n<p>\\n\\n<\/p>\n<ul data-start='1394' data-end='1573'>\\n \\t<\/p>\n<li data-start='1394' data-end='1467'>\\n\n<p data-start='1396' data-end='1467'><span class='katex'><span class='katex-mathml'>\u03c11\u03c1_1<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord'><span class='mord mathnormal'>\u03c1<\/span><span class='msupsub'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>1<\/span><\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> = Resistivity at reference temperature <span class='katex'><span class='katex-mathml'>t1t_1<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord'><span class='mord mathnormal'>t<\/span><span class='msupsub'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>1<\/span><\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> (e.g., 20\u00b0C)<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1468' data-end='1510'>\\n\n<p data-start='1470' data-end='1510'><span class='katex'><span class='katex-mathml'>t2t_2<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord'><span class='mord mathnormal'>t<\/span><span class='msupsub'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>2<\/span><\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> = Target operating temperature<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1511' data-end='1573'>\\n\n<p data-start='1513' data-end='1573'><span class='katex'><span class='katex-mathml'>\u03b1\u03b1<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>\u03b1<\/span><\/span><\/span><\/span> = Temperature coefficient (e.g., 0.00404 for copper)<\/p>\n<p>\\n<\/li>\n<p>\\n<\/ul>\n<p>\\n<\/p>\n<p data-start='1575' data-end='1611'><strong data-start='1575' data-end='1586'>Example<\/strong>:<br data-start='1587' data-end='1590'>For copper at 50\u00b0C:<\/p>\n<p>\\n<\/p>\n<p data-start='224' data-end='587'><span class='katex-display'><span class='katex'><span class='katex-mathml'>\u03c12=1.68\u00d710\u22128\u00d7(1+0.00404\u00d7(50\u221220))=1.88\u00d710\u22128&nbsp;\u03a9\u22c5m\u03c1_2 = 1.68 \\\\times 10^{-8} \\\\times (1 + 0.00404 \\\\times (50 &#8211; 20)) = 1.88 \\\\times 10^{-8} \\\\ \u03a9\u00b7m<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord'><span class='mord mathnormal'>\u03c1<\/span><span class='msupsub'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>2<\/span><\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'>1.68<\/span><span class='mbin'>\u00d7<\/span><\/span><span class='base'><span class='mord'>1<\/span><span class='mord'>0<span class='msupsub'><span class='vlist-t'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>\u22128<\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class='mbin'>\u00d7<\/span><\/span><span class='base'><span class='mopen'>(<\/span><span class='mord'>1<\/span><span class='mbin'>+<\/span><\/span><span class='base'><span class='mord'>0.00404<\/span><span class='mbin'>\u00d7<\/span><\/span><span class='base'><span class='mopen'>(<\/span><span class='mord'>50<\/span><span class='mbin'>\u2212<\/span><\/span><span class='base'><span class='mord'>20<\/span><span class='mclose'>))<\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'>1.88<\/span><span class='mbin'>\u00d7<\/span><\/span><span class='base'><span class='mord'>1<\/span><span class='mord'>0<span class='msupsub'><span class='vlist-t'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>\u22128<\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class='mspace'>&nbsp;<\/span><span class='mord'>\u03a9<\/span><span class='mpunct'>\u22c5<\/span><span class='mord mathnormal'>m<\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\\n\\n\\n<\/p>\n<hr data-start='1711' data-end='1714'>\\n\\n<\/p>\n<h2 data-start='1716' data-end='1768'>\u2705 Step-by-step: How to Use a Wire Size Calculator<\/h2>\n<p>\\n<\/p>\n<ol data-start='1770' data-end='2294'>\\n \\t<\/p>\n<li data-start='1770' data-end='1846'>\\n\n<p data-start='1773' data-end='1846'><strong data-start='1773' data-end='1805'>Choose the electrical system<\/strong>: DC, AC single-phase, or AC three-phase.<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1847' data-end='1900'>\\n\n<p data-start='1850' data-end='1900'><strong data-start='1850' data-end='1878'>Enter the source voltage<\/strong> (e.g., 120V or 220V).<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1901' data-end='1954'>\\n\n<p data-start='1904' data-end='1954'><strong data-start='1904' data-end='1936'>Input allowable voltage drop<\/strong> (typically \u2264 5%).<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1955' data-end='2007'>\\n\n<p data-start='1958' data-end='2007'><strong data-start='1958' data-end='1986'>Select the wire material<\/strong>: copper or aluminum.<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2008' data-end='2051'>\\n\n<p data-start='2011' data-end='2051'><strong data-start='2011' data-end='2037'>Enter the peak current<\/strong> (in amperes).<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2052' data-end='2114'>\\n\n<p data-start='2055' data-end='2114'><strong data-start='2055' data-end='2093'>Input the one-way cable run length<\/strong> (in meters or feet).<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2115' data-end='2163'>\\n\n<p data-start='2118' data-end='2163'><strong data-start='2118' data-end='2151'>Set the operating temperature<\/strong> (if known).<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2164' data-end='2294'>\\n\n<p data-start='2167' data-end='2190'>The calculator returns:<\/p>\n<p>\\n\\n<\/p>\n<ul data-start='2194' data-end='2294'>\\n \\t<\/p>\n<li data-start='2194' data-end='2222'>\\n\n<p data-start='2196' data-end='2222'>Cross-sectional area (mm\u00b2)<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2226' data-end='2241'>\\n\n<p data-start='2228' data-end='2241'>AWG wire size<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2245' data-end='2266'>\\n\n<p data-start='2247' data-end='2266'>Cable diameter (mm)<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2270' data-end='2294'>\\n\n<p data-start='2272' data-end='2294'>Voltage drop (V and %)<\/p>\n<p>\\n<\/li>\n<p>\\n<\/ul>\n<p>\\n<\/li>\n<p>\\n<\/ol>\n<p>\\n\\n<\/p>\n<hr data-start='2296' data-end='2299'>\\n\\n<\/p>\n<h2 data-start='2301' data-end='2345'>\ud83e\uddfe Example: Wire Size for AC Single-phase<\/h2>\n<p>\\n<\/p>\n<ul data-start='2347' data-end='2480'>\\n \\t<\/p>\n<li data-start='2347' data-end='2365'>\\n\n<p data-start='2349' data-end='2365'>Voltage: 120 V<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2366' data-end='2390'>\\n\n<p data-start='2368' data-end='2390'>Max Voltage Drop: 3%<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2391' data-end='2408'>\\n\n<p data-start='2393' data-end='2408'>Current: 25 A<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2409' data-end='2436'>\\n\n<p data-start='2411' data-end='2436'>Length: 100 m (one-way)<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2437' data-end='2457'>\\n\n<p data-start='2439' data-end='2457'>Material: Copper<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2458' data-end='2480'>\\n\n<p data-start='2460' data-end='2480'>Temperature: 50 \u00b0C<\/p>\n<p>\\n<\/li>\n<p>\\n<\/ul>\n<p>\\n<\/p>\n<p data-start='2482' data-end='2500'>Using the formula:<\/p>\n<p>\\n<\/p>\n<p data-start='224' data-end='587'><span class='katex-display'><span class='katex'><span class='katex-mathml'>A=2\u22c51.88\u00d710\u22128\u22c525\u22c51000.03\u22c5120=2.61\u00d710\u22125&nbsp;m2=26.1&nbsp;mm2A = \\\\frac{2 \\\\cdot 1.88 \\\\times 10^{-8} \\\\cdot 25 \\\\cdot 100}{0.03 \\\\cdot 120} = 2.61 \\\\times 10^{-5} \\\\text{ m}^2 = 26.1 \\\\text{ mm}^2<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>A<\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'><span class='mfrac'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'>0.03<span class='mbin'>\u22c5<\/span>1202<span class='mbin'>\u22c5<\/span>1.88<span class='mbin'>\u00d7<\/span>10<span class='msupsub'><span class='vlist-t'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>\u22128<\/span><\/span><\/span><\/span><span class='mbin'>\u22c5<\/span>25<span class='mbin'>\u22c5<\/span>100<\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'>2.61<\/span><span class='mbin'>\u00d7<\/span><\/span><span class='base'><span class='mord'>1<\/span><span class='mord'>0<span class='msupsub'><span class='vlist-t'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>\u22125<\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class='mord'><span class='mord text'>&nbsp;m<\/span><span class='msupsub'><span class='vlist-t'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>2<\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'>26.1<\/span><span class='mord'><span class='mord text'>&nbsp;mm<\/span><span class='msupsub'><span class='vlist-t'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>2<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\\n<\/p>\n<p data-start='2637' data-end='2657'>This corresponds to:<\/p>\n<p>\\n\\n<\/p>\n<ul data-start='2658' data-end='2686'>\\n \\t<\/p>\n<li data-start='2658' data-end='2674'>\\n\n<p data-start='2660' data-end='2674'><strong data-start='2660' data-end='2674'>51.6 kcmil<\/strong><\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2675' data-end='2686'>\\n\n<p data-start='2677' data-end='2686'><strong data-start='2677' data-end='2686'>3 AWG<\/strong><\/p>\n<p>\\n<\/li>\n<p>\\n<\/ul>\n<p>\\n\\n<\/p>\n<hr data-start='2688' data-end='2691'>\\n\\n<\/p>\n<h2 data-start='2693' data-end='2710'>\ud83e\udde0 Extra Notes<\/h2>\n<p>\\n<\/p>\n<ul data-start='2712' data-end='2875'>\\n \\t<\/p>\n<li data-start='2712' data-end='2770'>\\n\n<p data-start='2714' data-end='2770'><strong data-start='2714' data-end='2728'>AWG to mm\u00b2<\/strong> conversion follows a logarithmic scale.<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2771' data-end='2851'>\\n\n<p data-start='2773' data-end='2851'>1 circular mil (cmil) = area of a circle with 1 mil diameter \u2248 0.0005067 mm\u00b2<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='2852' data-end='2875'>\\n\n<p data-start='2854' data-end='2875'>1 kcmil = 1000 cmil<\/p>\n<p>\\n<\/li>\n<p>\\n<\/ul>\n<p>\\n\\n<\/p>\n<hr data-start='2877' data-end='2880'>\\n\\n<\/p>\n<h2 data-start='2882' data-end='2892'>\ud83e\udd14 FAQs<\/h2>\n<p>\\n<\/p>\n<p data-start='2894' data-end='2953'><strong data-start='2894' data-end='2941'>Q: How do I calculate wire size for motors?<\/strong><br data-start='2941' data-end='2944'>A: Use:<\/p>\n<p>\\n<\/p>\n<p data-start='224' data-end='587'><span class='katex-display'><span class='katex'><span class='katex-mathml'>A=1.25\u22c5\u03c1\u22c5I\u22c5LVA = \\\\frac{1.25 \\\\cdot \u03c1 \\\\cdot I \\\\cdot L}{V}<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>A<\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'><span class='mfrac'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='mord mathnormal'>V<\/span>1.25<span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>\u03c1<\/span><span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>I<\/span><span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>L<\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\\n<\/p>\n<p data-start='3005' data-end='3028'>Then convert m\u00b2 to mm\u00b2.<\/p>\n<p>\\n<\/p>\n<p data-start='3030' data-end='3098'><strong data-start='3030' data-end='3086'>Q: How do I calculate wire size for 3-phase systems?<\/strong><br data-start='3086' data-end='3089'>A: Use:<\/p>\n<p>\\n<\/p>\n<p data-start='224' data-end='587'><span class='katex-display'><span class='katex'><span class='katex-mathml'>A=3\u22c5\u03c1\u22c5I\u22c5LVA = \\\\frac{\\\\sqrt{3} \\\\cdot \u03c1 \\\\cdot I \\\\cdot L}{V}<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>A<\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'><span class='mfrac'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='mord mathnormal'>V<\/span><span class='mord sqrt'><span class='svg-align'>3<\/span><span class='vlist-s'>\u200b<\/span><\/span><span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>\u03c1<\/span><span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>I<\/span><span class='mbin'>\u22c5<\/span><span class='mord mathnormal'>L<\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\\n<\/p>\n<p data-start='3153' data-end='3199'><strong data-start='3153' data-end='3192'>Q: How is AWG wire size calculated?<\/strong><br data-start='3192' data-end='3195'>A:<\/p>\n<p>\\n<\/p>\n<p data-start='224' data-end='587'><span class='katex-display'><span class='katex'><span class='katex-mathml'>n=\u221239\u22c5log\u206192(D\/0.005)+36n = -39 \\\\cdot \\\\log_{92}(D \/ 0.005) + 36<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>n<\/span><span class='mrel'>=<\/span><\/span><span class='base'><span class='mord'>\u2212<\/span><span class='mord'>39<\/span><span class='mbin'>\u22c5<\/span><\/span><span class='base'><span class='mop'>log<span class='msupsub'><span class='vlist-t vlist-t2'><span class='vlist-r'><span class='vlist'><span class='sizing reset-size6 size3 mtight'><span class='mord mtight'>92<\/span><\/span><\/span><span class='vlist-s'>\u200b<\/span><\/span><\/span><\/span><\/span><span class='mopen'>(<\/span><span class='mord mathnormal'>D<\/span><span class='mord'>\/0.005<\/span><span class='mclose'>)<\/span><span class='mbin'>+<\/span><\/span><span class='base'><span class='mord'>36<\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\\n<\/p>\n<p data-start='3248' data-end='3288'>Where <span class='katex'><span class='katex-mathml'>DD<\/span><span class='katex-html' aria-hidden='true'><span class='base'><span class='mord mathnormal'>D<\/span><\/span><\/span><\/span> is the diameter in inches.<\/p>\n<p>\\n<\/p>\n<p data-start='3290' data-end='3420'><strong data-start='3290' data-end='3335'>Q: Does wire size increase with distance?<\/strong><br data-start='3335' data-end='3338'>A: Yes. Longer runs increase resistance and voltage drop, requiring thicker wires.<\/p>\n<p>\\n\\n\\n<\/p>\n<hr data-start='3422' data-end='3425'>\\n<\/p>\n<p data-start='3427' data-end='3545'>\ud83d\udccc <strong data-start='3430' data-end='3444'>Disclaimer<\/strong>: This calculation is for reference only. Always consult a certified electrician before installation.<\/p>\n<p>\\n<\/p>\n<p data-start='224' data-end='587'>\n<p>\\n<\/p>\n<p data-start='224' data-end='587'>Choosing the correct wire size is one of the most important decisions in any electrical installation. Using the wrong wire gauge can lead to overheating, voltage drop, or even electrical fires. That&#8217;s why electricians, engineers, and DIY installers use a <strong data-start='479' data-end='503'>wire size calculator<\/strong> to select the correct wire gauge based on current, voltage, distance, and material.<\/p>\n<p>\\n\\n\\n<\/p>\n<hr data-start='759' data-end='762'>\\n\\n<\/p>\n<h2 data-start='764' data-end='801'>\u2699\ufe0f What Is a Wire Size Calculator?<\/h2>\n<p>\\n<\/p>\n<p data-start='803' data-end='945'>A <strong data-start='805' data-end='829'>wire size calculator<\/strong> is a digital tool that helps determine the correct wire gauge (AWG) for an electrical circuit. It uses inputs like:<\/p>\n<p>\\n\\n<\/p>\n<ul data-start='947' data-end='1107'>\\n \\t<\/p>\n<li data-start='947' data-end='964'>\\n\n<p data-start='949' data-end='964'><strong data-start='949' data-end='964'>Voltage (V)<\/strong><\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='965' data-end='990'>\\n\n<p data-start='967' data-end='990'><strong data-start='967' data-end='990'>Current load (Amps)<\/strong><\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='991' data-end='1028'>\\n\n<p data-start='993' data-end='1028'><strong data-start='993' data-end='1028'>Circuit length (feet or meters)<\/strong><\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1029' data-end='1061'>\\n\n<p data-start='1031' data-end='1061'><strong data-start='1031' data-end='1061'>Voltage drop tolerance (%)<\/strong><\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1062' data-end='1107'>\\n\n<p data-start='1064' data-end='1107'><strong data-start='1064' data-end='1107'>Conductor material (Copper or Aluminum)<\/strong><\/p>\n<p>\\n<\/li>\n<p>\\n<\/ul>\n<p>\\n<\/p>\n<p data-start='1109' data-end='1248'>By calculating the required cross-sectional area and comparing it to standard AWG sizes, the tool suggests the smallest suitable wire size.<\/p>\n<p>\\n\\n\\n<\/p>\n<hr data-start='1250' data-end='1253'>\\n\\n<\/p>\n<h2 data-start='1255' data-end='1292'>\ud83d\udca1 Why Use a Wire Size Calculator?<\/h2>\n<p>\\n<\/p>\n<ul data-start='1294' data-end='1580'>\\n \\t<\/p>\n<li data-start='1294' data-end='1355'>\\n\n<p data-start='1296' data-end='1355'>\u2705 Ensures <strong data-start='1306' data-end='1324'>safe operation<\/strong> by avoiding undersized wires<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1356' data-end='1410'>\\n\n<p data-start='1358' data-end='1410'>\u2705 Reduces <strong data-start='1368' data-end='1384'>voltage drop<\/strong> in long-distance wiring<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1411' data-end='1459'>\\n\n<p data-start='1413' data-end='1459'>\u2705 Helps <strong data-start='1421' data-end='1440'>comply with NEC<\/strong> or IEC standards<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1460' data-end='1508'>\\n\n<p data-start='1462' data-end='1508'>\u2705 Saves material cost by avoiding oversizing<\/p>\n<p>\\n<\/li>\n<p>\\n \\t<\/p>\n<li data-start='1509' data-end='1580'>\\n\n<p data-start='1511' data-end='1580'>\u2705 Perfect for electricians, solar installers, engineers, and students<\/p>\n<p>\\n<\/li>\n<p>\\n<\/ul>\n<p>\\n<\/p>\n<div class='contain-inline-size rounded-2xl relative bg-token-sidebar-surface-primary'>\\n<\/p>\n<div class='overflow-y-auto p-4' dir='ltr'><\/div>\n<p>\\n<\/p><\/div>\n<p>\\n\\n<\/p>\n<hr data-start='4573' data-end='4576'>\\n\\n<\/p>\n<h2 data-start='4578' data-end='4593'>\u2705 Conclusion<\/h2>\n<p>\\n<\/p>\n<p data-start='4595' data-end='4896'>A <strong data-start='4597' data-end='4621'>wire size calculator<\/strong> is a valuable tool for both professionals and DIY users who want to ensure their wiring is safe, efficient, and code-compliant. By offering this tool on your site, you not only help users solve a real-world problem, but also demonstrate the technical strength of your brand.<\/p>\n<p>\\n\\n\\n<\/p>\n<hr data-start='4898' data-end='4901'>\\n\\n<\/p>\n<h2 data-start='4903' data-end='4947'>\ud83d\udcde Need Help with Electrical Wire Sizing?<\/h2>\n<p>\\n<\/p>\n<p data-start='4949' data-end='5172'>At <strong data-start='4952' data-end='4972'>TOT Wire &amp; Cable<\/strong>, we offer expert assistance and high-quality electrical wires from <strong data-start='5040' data-end='5061'>14 AWG to 4\/0 AWG<\/strong>, with both <strong data-start='5073' data-end='5104'>copper and aluminum options<\/strong>. Contact us today for customized sizing advice or a bulk quotation.<\/p>\n<p>\\n<\/p>\n<p data-start='5174' data-end='5239'>\ud83d\udc49 &nbsp;<a class='' href='https:\/\/totcables.com\/contact-us\/' rel='noopener' data-start='5214' data-end='5239'>Request a Free Quote<\/a><\/p>\n<p>&#8220;}]}],&#8221;section_settings&#8221;:&#8221;&#8221;},&#8221;scripts&#8221;:{},&#8221;css&#8221;:{},&#8221;css_page&#8221;:&#8221;\\n        .cable-calculator {<br \/>\\n            max-width: 800px;<br \/>\\n            margin: 20px auto;<br \/>\\n            padding: 20px;<br \/>\\n            background: #ffffff;<br \/>\\n            border: 1px solid #ddd;<br \/>\\n            border-radius: 8px;<br \/>\\n            font-family: Arial, sans-serif;<br \/>\\n        }<\/p>\n<p>\\n<\/p>\n<p>        .calc-header {<br \/>\\n            text-align: center;<br \/>\\n            margin-bottom: 20px;<br \/>\\n            padding-bottom: 15px;<br \/>\\n            border-bottom: 2px solid #007cba;<br \/>\\n  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