| AWG | Diameter (mm) | Diameter (in) | Resistance (Ω/1000 ft) | | --- | --- | --- | --- | | 10 | 2.588 | 0.1019 | 1.018 | | 12 | 2.052 | 0.0808 | 1.59 | | 14 | 1.628 | 0.0641 | 2.52 | | 16 | 1.291 | 0.0508 | 4.09 | | 18 | 1.024 | 0.0403 | 6.51 | | 20 | 0.8128 | 0.0320 | 10.4 | | 22 | 0.6438 | 0.0254 | 16.5 | | 24 | 0.5109 | 0.0201 | 26.2 | | 26 | 0.4059 | 0.0160 | 41.7 | | 28 | 0.3219 | 0.0127 | 66.4 | | 30 | 0.2559 | 0.0101 | 105.8 |
The AWG system uses a logarithmic scale to measure wire diameters. The gauge number is inversely proportional to the diameter of the wire. This means that as the gauge number increases, the diameter of the wire decreases. For example: awg wire gauge sizes