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AWG - American Wire Gauge vs. Circular Mils

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

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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.

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

Download and print AWG - Circular mils and mm² chart

AWG to Inches

Diameter in inches can be calculated from AWG as

d_in = 0.005 92^{(36 - n)/39} (1)

where

d_in = diameter (inches)

n = gauge

AWG to mm

Diameter in mm can be calculated from AWG as

d_mm = 0.127 92^{(36 - n)/39} (1b)

where

d_mm = diameter (mm)

n = gauge

AWG to Inches and mm Calculator

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Related Topics

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

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