by admin|June 5, 2014 | Calculators

Wire Resistance Calculator

Wire Resistance Calculator

Quick Calculator

Quick Calculator

Wire Length (feet)

Wire Gauge (AWG)

Wire Resistance

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

Advanced Calculator

Advanced Calculator

All resistance values in ohms. All wire gauges in AWG. All wire is copper.

Select Unit of Measure

Step 1: Find the Wire Resistances

Your Interface Cables

Interface wire from Tester to Point A

___ ohms


Interface wire from Tester to Point B

___ ohms


Contact resistance from interface to Device Under Test

___ ohms


___ ohms


Your Device Under Test

Wire in DUT

___ ohms




Wire Resistance Results

Expected Resistance

2-wire measurement: ___ ohms

4-wire measurement (points combine at A and B): ___ ohms

4-wire measurement (points combine on DUT): ___ ohms


Step 2: Factor in the Variations

Variations


___%


Accuracy of Tester

Recommended Thresholds

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

Wire Resistance Table

Wire Resistance Table

Typical Uses

Wire Gauge #

Diameter (Mils)

Area Diameter

Ohms per 100 ft.

Ohms per 10 ft.

Ohms per 1 ft.

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

Standard 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

Standard Hook-up

20

31.961

1,021.50

1.01500

0.10150

0.01015

25

17.900

320.40

3.23700

0.32370

0.03237

Interface

22

25.347

642.40

1.61400

0.16140

0.01614

23

22.571

509.45

2.03600

0.20360

0.02036

Standard 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.