Resistance Correction Table

 
Temperature Resistance Correction Factor
°C °F Copper Aluminum
15.0 59.0 0.9804  
16.0 60.8 0.9842  
17.0 62.6 0.9882  
18.0 64.4 0.9922  
19.0 66.2 0.9961  
20.0 68.0 1.0000 1.0000
20.5 68.9 1.0020 1.0021
21.0 69.8 1.0039 1.0041
21.5 70.7 1.0059 1.0062
22.0 71.6 1.0079 1.0082
22.5 72.5 1.0098 1.0103
23.0 73.4 1.0118 1.0123
23.5 74.3 1.0138 1.0144
24.0 75.2 1.0157 1.0164
24.5 76.1 1.0177 1.0185
25.0 77.0 1.0197 1.0205
25.5 77.9 1.0216 1.0226
26.0 78.8 1.0236 1.0246
26.5 79.7 1.0255 1.0267
27.0 80.6 1.0275 1.0287
27.5 81.5 1.0295 1.0308
28.0 82.4 1.0314 1.0328
28.5 83.3 1.0334 1.0349
29.0 84.2 1.0354 1.0369
29.5 85.1 1.0373 1.0390
30.0 86.0 1.0393 1.0410
30.5 86.9 1.0413 1.0431
31.0 87.8 1.0433  
32.0 89.6 1.0471  
33.0 91.4 1.0511  
34.0 93.2 1.0551  
35.0 95.0 1.0590  
36.0 96.8 1.0630  
37.0 98.6 1.0668  
38.0 100.4 1.0709  
39.0 102.2 1.0747  
40.0 104.0 1.0786  
To convert resistance to 20°C (68°F), divide resistance by the correction factor for the corresponding temperature and metal indicated in the above table.
To find ohms/foot, divide Volume Resistivity by area in circular mils.