How to convert American wire gauge into square area?




How to convert American wire gauge into square area? After knowing the number and diameter of the copper wires

Formula: S(area)=0.7854ND2  (N: Nomber of the core wires; D-Outer Diameter of the copper wires)
For example: 7/0.08, Area =0.7854×7×0.08×0.08=0.0352mm² ≈32AWG

    
 
AWG and mm² comparison table
AWG  Outer Diameter  area
mm²
Resistance
ohm/KM
  AWG Outer Diameter area
mm²
Resistance
ohm/KM
mm inch mm inch
4/0 11.68 0.46 107.22 0.17    22 0.643 0.0253 0.3247 54.3
3/0 10.40 0.4096 85.01 0.21   23 0.574 0.0226 0.2588 48.5
2/0 9.27 0.3648 67.43 0.26   24 0.511 0.0201 0.2047 89.4
1/0 8.25 0.3249 53.49 0.33   25 0.44 0.0179 0.1624 79.6
1 7.35 0.2893 42.41 0.42   26 0.404 0.0159 0.1281 143
2 6.54 0.2576 33.62 0.53   27 0.361 0.0142 0.1021 128
3 5.83 0.2294 26.67 0.66   28 0.32 0.0126 0.0804 227
4 5.19 0.2043 21.15 0.84   29 0.287 0.0113 0.0647 289
5 4.62 0.1819 16.77 1.06   30 0.254 0.0100 0.0507 361
6 4.11 0.1620 13.30 1.33   31 0.226 0.0089 0.0401 321
7 3.67 0.1443 10.55 1.68   32 0.203 0.0080 0.0316 583
8 3.26 0.1285 8.37 2.11   33 0.18 0.0071 0.0255 944
9 2.91 0.1144 6.63 2.67   34 0.16 0.0063 0.0201 956
10 2.59 0.1019 5.26 3.36   35 0.142 0.0056 0.0169 1200
11 2.30 0.0907 4.17 4.24   36 0.127 0.0050 0.0127 1530
12 2.05 0.0808 3.332 5.31   37 0.114 0.0045 0.0098 1377
13 1.82 0.0720 2.627 6.69   38 0.102 0.0040 0.0081 2400
14 1.63 0.0641 2.075 8.45   39 0.089 0.0035 0.0062 2100
15 1.45 0.0571 1.646 10.6   40 0.079 0.0031 0.0049 4080
16 1.29 0.0508 1.318 13.5   41 0.071 0.0028 0.0040 3685
17 1.15 0.0453 1.026 16.3   42 0.064 0.0025 0.0032 6300
18 1.02 0.0403 0.8107 21.4   43 0.056 0.0022 0.0025 5544
19 0.912 0.0359 0.5667 26.9   44 0.051 0.0020 0.0020 9180
20 0.813 0.0320 0.5189 33.9   45 0.046 0.0018 0.0016 10200
21 0.724 0.0285 0.4116 42.7   46 0.041 0.0016 0.0013 16300

 
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