# AWG American Wire Gauge Diameter and Resistance

The AWG is a logarithmic scale, so given an know resistance or diameter for a certain gauge, you can quickly figure out the resistance and diameter of another gauge number, by addition and subtraction.

Resistance:

1. AWG 15 is 10 mohm/m.
2. Adding 3 doubles the resistance, and subtracting 3 halves it.
3. Adding 10 multiplies the resistance by 10, and subtracting 10 it divides by 10.

Diameter:

1. AWG 18 has a solid diameter of about 1mm
2. Adding 6 halves the diameter, Subtracting 6 doubles the diameter
3. Adding 20 divides the diameter by 10, and subtracting 20 multiplies the diameter by 10.
 AWG Chart AWG Number [Inch] for Solid Rod [mm] for Solid Rod [mm] for Solid Rod Resistance [Ohm/m] Copper (20 C,68 F) 4/0 = 0000 0.460 11.7 107 0.000161 3/0 = 000 0.410 10.4 85.0 0.000203 2/0 = 00 0.365 9.26 67.4 0.000256 1/0 = 0 0.325 8.25 53.5 0.000323 1 0.289 7.35 42.4 0.000407 2 0.258 6.54 33.6 0.000513 3 0.229 5.83 26.7 0.000647 4 0.204 5.19 21.1 0.000815 5 0.182 4.62 16.8 0.00103 6 0.162 4.11 13.3 0.00130 7 0.144 3.66 10.5 0.00163 8 0.128 3.26 8.36 0.00206 9 0.114 2.91 6.63 0.00260 10 0.102 2.59 5.26 0.00328 11 0.0907 2.30 4.17 0.00413 12 0.0808 2.05 3.31 0.00521 13 0.0720 1.83 2.62 0.00657 14 0.0641 1.63 2.08 0.00829 15 0.0571 1.45 1.65 0.0104 16 0.0508 1.29 1.31 0.0132 17 0.0453 1.15 1.04 0.0166 18 0.0403 1.02 0.823 0.0210 19 0.0359 0.912 0.653 0.0264 20 0.0320 0.812 0.518 0.0333 21 0.0285 0.723 0.410 0.0420 22 0.0253 0.644 0.326 0.0530 23 0.0226 0.573 0.258 0.0668 24 0.0201 0.511 0.205 0.0842 25 0.0179 0.455 0.162 0.106 26 0.0159 0.405 0.129 0.134 27 0.0142 0.361 0.102 0.169 28 0.0126 0.321 0.0810 0.213 29 0.0113 0.286 0.0642 0.268 30 0.0100 0.255 0.0509 0.339 31 0.00893 0.227 0.0404 0.427 32 0.00795 0.202 0.0320 0.538 33 0.00708 0.180 0.0254 0.679 34 0.00631 0.160 0.0201 0.856 35 0.00562 0.143 0.0160 1.08 36 0.00500 0.127 0.0127 1.36 37 0.00445 0.113 0.0100 1.72 38 0.00397 0.101 0.00797 2.16 39 0.00353 0.0897 0.00632 2.73 40 0.00314 0.0799 0.00501 3.44

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