AWG Wire Chart
Quickly determine the right wire gauge for your power requirements. This table provides the diameter, resistance, and maximum current-carrying capacity (Ampacity) for standard copper wiring in various electronic applications.
| AWG | Diameter (mm) | Resistance (Ω/km) | Max Current (A) |
|---|---|---|---|
| 10 | 2.588 | 3.27 | 30 |
| 12 | 2.053 | 5.21 | 20 |
| 14 | 1.628 | 8.28 | 15 |
| 18 | 1.024 | 20.95 | 7 |
| 22 | 0.644 | 52.96 | 5 |
| 24 | 0.511 | 84.22 | 2 |
| 28 | 0.321 | 212.9 | 0.8 |
Safety First: The “Max Current” values are based on standard chassis wiring at room temperature. For bundled wires or high-heat environments, always de-rate these values.
Resistance Matters: Use the Resistance column to calculate voltage drop over long cable runs, which is critical for 5V and 12V DC projects.