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Home Articles Electrical Wire Conversion Table

Electrical Wire Conversion Table

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Electrical Wire Conversion Table

AWG is a standard denoting wire diameter, whereas the metric conductor sizes according to standard IEC 60228 describe a wire in terms of its cross-sectional area, rather than its diameter, because the cross section is directly proportional to its strength, weight, and resistance. The cross-sectional area is also roughly proportional to the maximum current-carrying capacity of a wire.

There is, however, an equivalent unit of area for comparing metric to AWG wire sizes: the circular mil. It is the equivalent area of a circle whose diameter is .001 (10-3) inch, or approximately .7854 millionths of a square inch
(or 2.5 x 10-7 times pi). To convert millimetres squared approximately to circular mils multiply by 1974 or divide by
0.0005067. Conductors larger than 4/0 AWG are generally identified by the area in thousands of circular mils (KCMIL), where 1 KCMIL = 0.5067 mm².


Circ. Mils
Typical
AWG
Size
Metric
Wire Size
mm²
Equivalent
Circ. Mils
Stranding/Wire
Diameter per Strand
Approximate
Overall Diameter
in. mm in. mm
    0.50 987 1/.032 1/.813 .032 0.81
1020 20     7/.0121 7/.307 .036 0.91
    0.75 1480 1/.039 1/.991 .039 0.99
1620 18     1/.0403 1/1.02 .040 1.02
1620 18     7/.0152 7/.386 .046 1.16
    1.0 1974 1/.045 1/1.14 .045 1.14
    1.0 1974 7/.017 7/.432 .051 1.30
2580 16     1/.0508 1/1.29 .051 1.29
2580 16     7/.0192 7/.488 .058 1.46
    1.5 2960 1/.055 1/1.40 .055 1.40
    1.5 2960 7/.021 7/.533 .063 1.60
4110 14     1/.0641 1/1.63 .064 1.63
4110 14     7/.0242 7/.615 .073 1.84
    2.5 4934 1/.071 1/1.80 .071 1.80
    2.5 4934 7/.027 7/.686 .081 2.06
6530 12     1/.0808 1/2.05 .081 2.05
6530 12     7/.0305 7/.775 .092 2.32
    4 7894 1/.089 1/2.26 .089 2.26
    4 7894 7/.034 7/.864 .102 2.59
10380 10     1/.1019 1/2.59 .102 2.59
10380 10     7/.0385 7/.978 .116 2.93
    6 11840 1/.109 1/2.77 .109 2.77
    6 11840 7/.042 7/.107 .126 3.21
13090 9     1/.1144 1/2.91 .1144 2.91
13090 9     7/.0432 7/1.10 .130 .3.30
 16510 8     1/.1285 1/3.26 .128 3.26
16510 8     7/.0486 7/1.23 .146 3.70
    10 19740 1/.141 1/3.58 .141 3.58
    10 19740 7/.054 7/1.37 .162 4.12
20820 7     1/.1443 1/3.67 .144 3.67
20820 7     7/.0545 7/1.38 .164 4.15
26240 6     1/.162 1/4.11 .162 4.11
26240 6     7/.0612 7/1.55 .184 4.66
    16 31580 7/.068 7/1.73 .204 5.18
33090 5     7/.0688 7/1.75 .206 5.24
41740 4     7/.0772 7/1.96 .232 5.88
    25 49340 7/.085 7/2.16 .255 6.48
    25 49340 19/.052 19/1.32 .260 6.60
52620 3     7/.867 7/2.20 .260 6.61
66360 2     7/.0974 7/2.47 .292 7.42
    35 69070 7/.100 7/2.54 .300 7.62
    35 69070 19/.061 19/1.55 .305 7.75
83690 1     19/.0664 19/1.69 .332 8.43
    50 98680 19/.073 19/1.85 .365 9.27
105600 1/0     19/.0745 19/1.89 .373 9.46
133100 2/0     19/.0837 19/2.13 .419 10.6
    70 138100 19/.086 19/2.18 .430 10.9
167800 3/0     19/.094 19/2.39 .470 11.9
167800 3/0     37/.0673 37/1.71 .471 12.0
    95 187500 19/.101 19/2.57 .505 12.8
    95 187500 37/.072 37/1.83 .504 12.8
211600 4/0     19/.1055 19/2.68 .528 13.4
    120 237.8 KCMIL 37/.081 37/2.06 .567 14.4
250 KCMIL       37/.0822 37/2.09 .575 14.6
300 KCMIL   150   37/.090 37/2.29 .630 16.0
 

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