Engineering Wire Chart
AWG Wire Size Chart (Amps, Diameter, mm² & Resistance)
Complete American Wire Gauge (AWG) reference chart with conductor diameter in mm and inches, cross-sectional area, copper and aluminum resistance, and typical ampacity.
21 gauges displayed
AWG Gauge | Diameter (mm / in) | Area (mm² / kcmil) | Copper Res @ 20°C (Ω/km) | Ref Ampacity (75°C)* |
|---|---|---|---|---|
| 4/0 (0000) | 11.684 mm (0.4600 in) | 107.220 mm² (211.6 kcmil) | 0.1608 Ω/km | 230 A |
| 3/0 (000) | 10.404 mm (0.4096 in) | 85.010 mm² (167.8 kcmil) | 0.2028 Ω/km | 200 A |
| 2/0 (00) | 9.266 mm (0.3648 in) | 67.430 mm² (133.1 kcmil) | 0.2557 Ω/km | 175 A |
| 1/0 (0) | 8.252 mm (0.3249 in) | 53.490 mm² (105.6 kcmil) | 0.3224 Ω/km | 150 A |
| 1 AWG | 7.348 mm (0.2893 in) | 42.410 mm² (83.7 kcmil) | 0.4066 Ω/km | 130 A |
| 2 AWG | 6.544 mm (0.2576 in) | 33.620 mm² (66.4 kcmil) | 0.5127 Ω/km | 115 A |
| 3 AWG | 5.827 mm (0.2294 in) | 26.670 mm² (52.6 kcmil) | 0.6465 Ω/km | 100 A |
| 4 AWG | 5.189 mm (0.2043 in) | 21.150 mm² (41.7 kcmil) | 0.8152 Ω/km | 85 A |
| 6 AWG | 4.115 mm (0.1620 in) | 13.300 mm² (26.2 kcmil) | 1.2960 Ω/km | 65 A |
| 8 AWG | 3.264 mm (0.1285 in) | 8.366 mm² (16.5 kcmil) | 2.0610 Ω/km | 50 A |
| 10 AWG | 2.588 mm (0.1019 in) | 5.261 mm² (10.4 kcmil) | 3.2770 Ω/km | 35 A |
| 12 AWG | 2.053 mm (0.0808 in) | 3.309 mm² (6.5 kcmil) | 5.2110 Ω/km | 25 A |
| 14 AWG | 1.628 mm (0.0641 in) | 2.081 mm² (4.1 kcmil) | 8.2860 Ω/km | 20 A |
| 16 AWG | 1.291 mm (0.0508 in) | 1.309 mm² (2.6 kcmil) | 13.1700 Ω/km | 13 A |
| 18 AWG | 1.024 mm (0.0403 in) | 0.823 mm² (1.6 kcmil) | 20.9500 Ω/km | 10 A |
| 20 AWG | 0.812 mm (0.0320 in) | 0.518 mm² (1.0 kcmil) | 33.3100 Ω/km | 5 A |
| 22 AWG | 0.644 mm (0.0253 in) | 0.326 mm² (0.6 kcmil) | 52.9600 Ω/km | 3 A |
| 24 AWG | 0.511 mm (0.0201 in) | 0.205 mm² (0.4 kcmil) | 84.2200 Ω/km | 2 A |
| 26 AWG | 0.405 mm (0.0159 in) | 0.129 mm² (0.3 kcmil) | 133.9000 Ω/km | 1 A |
| 28 AWG | 0.321 mm (0.0126 in) | 0.081 mm² (0.2 kcmil) | 212.9000 Ω/km | 0.8 A |
| 30 AWG | 0.255 mm (0.0100 in) | 0.051 mm² (0.1 kcmil) | 338.6000 Ω/km | 0.5 A |
*Ampacity values are general educational reference based on standard 75°C insulated copper conductor ratings under normal ambient conditions. Final sizing must verify NEC Table 310.16 or applicable regional code.