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AWG - American Wire Gauge vs. Circular Mils

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

American Wire Gauge (AWG) is a U.S. standard for wire conductor size. 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 to denote cross-sectional size of a wire or cable.

AWG - American Wire Gauge vs. Circular Mils
American Wire Gauge
(AWG)
Diameter
(mils)
(10-3 in)
Area
(circular mils)
(CM)
(mil2)
Area
(mm2)
Diameter
(mm)
0000 (4/0) 460 211592 107 11.7
000 (3/0) 410 167800 85.0 10.4
00 (2/0) 365 133072 67.4 9.27
0 (1/0) 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
18 40.3 1624 0.823 1.02
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

dmm = 0.127 92(36 - n)/39                       (1b)

where

dmm = diameter (mm)

n = gauge

# gauge

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Citation

• The Engineering ToolBox (2004). AWG - American Wire Gauge vs. Circular Mils. [online] Available at: https://www.engineeringtoolbox.com/awg-wire-gauge-circular-mils-d_819.html [Accessed Day Month Year].

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