# American Wire Gauge to mm2 Conversion

American Wire Gauge (AWG) is a U.S. standard set of wire conductor sizes. The "gauge" is related to the diameter of the wire.

The AWG standard includes copper, aluminum and other materials.  Current electrical code usually specifies household wiring to be AWG number 12 or 14. Telephone wire is usually 22, 24, or 26 AWG. The higher the gauge number, the smaller the diameter and the thinner the wire.

The table below can be used to convert American Wire Gauge (AWG) to square mm cross sectional area.

 American Wire Gauge (AWG) Diameter (inches) Diameter (mm) Cross Sectional Area (mm2) 0000 0.46 11.68 107.16 000 0.4096 10.40 84.97 00 0.3648 9.27 67.40 0 0.3249 8.25 53.46 1 0.2893 7.35 42.39 2 0.2576 6.54 33.61 3 0.2294 5.83 26.65 4 0.2043 5.19 21.14 5 0.1819 4.62 16.76 6 0.162 4.11 13.29 7 0.1443 3.67 10.55 8 0.1285 3.26 8.36 9 0.1144 2.91 6.63 10 0.1019 2.59 5.26 11 0.0907 2.30 4.17 12 0.0808 2.05 3.31 13 0.072 1.83 2.63 14 0.0641 1.63 2.08 15 0.0571 1.45 1.65 16 0.0508 1.29 1.31 17 0.0453 1.15 1.04 18 0.0403 1.02 0.82 19 0.0359 0.91 0.65 20 0.032 0.81 0.52 21 0.0285 0.72 0.41 22 0.0254 0.65 0.33 23 0.0226 0.57 0.26 24 0.0201 0.51 0.20 25 0.0179 0.45 0.16 26 0.0159 0.40 00.13

The AWG - American Wire Gauge - is used as a standard method of denoting wire diameter, measuring the diameter of the conductor (the bare wire) with the insulation removed. AWG is sometimes also known as Brown and Sharpe (B&S) Wire Gauge.

 AWG Diameter (mm) Diameter (in) Square (mm2) Resistance (ohm/1000m) 40 0.08 . 0.0050 3420 39 0.09 . 0.0064 2700 38 0.10 0.0040 0.0078 2190 37 0.11 0.0045 0.0095 1810 36 0.13 0.005 0.013 1300 35 0.14 0.0056 0.015 1120 34 0.16 0.0063 0.020 844 33 0.18 0.0071 0.026 676 32 0.20 0.008 0.031 547 30 0.25 0.01 0.049 351 28 0.33 0.013 0.08 232.0 27 0.36 0.018 0.096 178 26 0.41 0.016 0.13 137 25 0.45 0.018 0.16 108 24 0.51 0.02 0.20 87.5 22 0.64 0.025 0.33 51.7 20 0.81 0.032 0.50 34.1 18 1.02 0.04 0.82 21.9 16 1.29 0.051 1.3 13.0 14 1.63 0.064 2.0 8.54 13 1.80 0.072 2.6 6.76 12 2.05 0.081 3.3 5.4 10 2.59 0.10 5.26 3.4 8 3.25 0.13 8.30 2.2 6 4.115 0.17 13.30 1.5 4 5.189 0.20 21.15 0.8 2 6.543 0.26 33.62 0.5 1 7.348 0.29 42.41 0.4 0 8.252 0.33 53.49 0.31 00 (2/0) 9.266 0.37 67.43 0.25 000 (3/0) 10.40 0.41 85.01 0.2 0000 (4/0) 11.684 0.46 107.22 0.16

Because of less electrical resistance a thick wire will carry more current with less voltage drop than a thin wire. For a long distance it may be necessary to increase the wire diameter - reducing the gauge - to limit the voltage drop.