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Resistance of Wire (Wire Resistance Calculator)

Wire Table for International Standards Annealed Copper American Wire Gauge (B.&S.) (Table modified to display shorter lengths and typical uses)

Quick Calculator
Wire Length (feet)     Gauge (AWG)     

Wire Resistance:  ___ ohms       Also see the Advanced Calculator
TYPICAL
USES
WIRE
GAUGE #
DIAMETER
in MILS.
AREA
DIAMETER
OHMS PER
100 FT.
OHMS PER
10 FT.
OHMS PER
FOOT
House Wiring 12 80.808 6,529.90 0.15880 0.015880 0.001588

13 71.901 5,178.40 0.20030 0.020030 0.002003
Heavy Power Wire 14 64.084 4,106.80 0.25250 0.025250 0.002525
  15 57.068 3,256.70 0.31840 0.03184 0.00318
Heavy Hook-up 16 50.820 2,582.90 0.40160 0.04016 0.00402

17 45.257 2,048.20 0.50640 0.05064 0.00506
Std. Computer
Power Cables
18 40.303 1,624.30 0.63850 0.06385 0.00639

19 35.890 1,288.10 0.80510 0.08051 0.00805
Std. Hook-up 20 31.961 1,021.50 1.01500 0.10150 0.01015

21 28.462 810.10 1.28000 0.12800 0.01280
Typ. Interface 22 25.347 642.40 1.61400 0.16140 0.01614

23 22.571 509.45 2.03600 0.20360 0.02036
Std. Hook-up 24 20.100 404.01 2.56700 0.25670 0.02567

25 17.900 320.40 3.23700 0.32370 0.03237
Heavy .050
Ribbon Cable
26 15.940 254.10 4.08100 0.40810 0.04081

27 14.195 201.50 5.14700 0.51470 0.05147
Std. .050
Ribbon Cable
28 12.641 159.79 6.49000 0.64900 0.06490
  29 11.257 126.72 8.18300 0.81830 0.08183
Std. .025 pitch
Ribbon Cable /
Solid Wire for
Wire Wrap
30 10.025 100.50 10.32000 1.03200 0.10320

For pullout force information see our Pullout Force Comparison.