AWG - American Wire Gauge and Circular Mils

AWG, diameter mil, circular mil, diameter in mm and area in mm2

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 wire materials. Typical household copper wiring is AWG number 12 or 14. Telephone wire is usually 22, 24, or 26. The higher the gauge number, the smaller the diameter and the thinner the wire.

The Circular Mil - CM - is a unit of area used especially when denoting the cross-sectional size of a wire or cable.

American Wire Gauge
(AWG)
Diameter
(mils)
(10-3 in)
Area
(circular mils)
(CM)
(mil2)
Area
(mm2)
Diameter
(mm)
0000 460 211592 107 11.7
000 410 167800 85.0 10.4
00 365 133072 67.4 9.27
0 325 105531 53.5 8.25
1 289 83690 42.4 7.35
2 258 66369 33.6 6.54
3 229 52633 26.7 5.83
4 204 41740 21.2 5.19
5 182 33101 16.8 4.62
6 162 26251 13.3 4.12
7 144 20818 10.5 3.67
8 128 16509 8.37 3.26
9 114 13092 6.63 2.91
10 102 10383 5.26 2.59
11 90.7 8234 4.17 2.31
12 80.8 6530 3.31 2.05
13 72.0 5178 2.62 1.83
14 64.1 4107 2.08 1.63
15 57.1 3257 1.65 1.45
16 50.8 2583 1.31 1.29
17 45.3 2048 1.04 1.15
20 32.0 1022 0.518 0.812
21 28.5 810 0.410 0.723
22 25.3 642 0.326 0.644
23 22.6 510 0.258 0.573
24 20.1 404 0.205 0.511
25 17.9 320 0.162 0.455

AWG to Inches 

Diameter in inches can be calculated from AWG as

din = 0.005 92(36 - n)/39       (1)

where

din = diameter (inches)

n = gauge

AWG to mm

Diameter in mm can be calculated from AWG as

din = 0.127 92(36 - n)/39       (1b)

where

din = diameter (inches)

n = gauge

Related Topics

  • Electrical - Electrical units, amps and electrical wiring, wire gauge and AWG, electrical formulas and motors

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