Wire Resistance Calculator & Table

Wire Resistance: ___ ohms (Results are rounded to the nearest milliohm.)

All lengths in
All resistance values in ohms
All wire gauges are AWG
All wire is copper

The wire from tester to:
Point A: Length Gauge	___ ohms
Point B: Length Gauge	___ ohms
Contact resistance from fixture to DUT:
At Point A: ohms	___ ohms
At Point B: ohms	___ ohms

Wire in DUT:
Length Gauge	___ ohms

Expected resistance of:
A 2-wire measurement:	___ ohms
A 4-wire measurement (points combine at A and B):	___ ohms
4-wire measurement (points combine on DUT):	___ ohms

Wire Resistance %
Wire Length %
Max Temperature °	___%
°F or °C
Accuracy of Tester Percent of reading % Fixed error ohms


Highest Expected Resistance for 2-wire:	___ ohms
Highest Expected Resistance for 4-wire (points combine at A and B):	___ ohms
Highest Expected Resistance for true 4-wire (points combine on DUT):	___ ohms

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

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.