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AWG Wire Size Chart

Reference table for American Wire Gauge (AWG) sizes. The "Area (CM)" column is crucial for voltage drop calculations. Larger Circular Mils indicate a thicker wire with less resistance.

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Wire Size (AWG/kcmil) Area (Circular Mils) Diameter (Inches) Ampacity (Amps) ⓘ
18 AWG 1,620 0.0403 14
16 AWG 2,580 0.0508 18
14 AWG 4,110 0.0641 20
12 AWG 6,530 0.0808 25
10 AWG 10,380 0.1019 35
8 AWG 16,510 0.1285 50
6 AWG 26,240 0.1840 65
4 AWG 41,740 0.2320 85
3 AWG 52,620 0.2600 100
2 AWG 66,360 0.2920 115
1 AWG 83,690 0.3320 130
1/0 AWG 105,600 0.3720 150
2/0 AWG 133,100 0.4180 175
3/0 AWG 167,800 0.4700 200
4/0 AWG 211,600 0.5280 230
250 kcmil 250,000 0.5750 255
300 kcmil 300,000 0.6300 285
350 kcmil 350,000 0.6810 310
500 kcmil 500,000 0.8130 380

* Note: Ampacity values are approximate and depend on insulation type (e.g., THHN, THWN-2) and ambient temperature. Consult NEC Table 310.16 for precise values.