Table

Aluminum Wire Resistance by AWG/kcmil

Aluminum Wire Resistance by AWG/kcmil lookup table with assumptions and boundary notes.

Scope

Resistance lookup only. This table does not provide ampacity, conductor substitution, or installation approval.

Lookup table

Lookup aluminum conductor resistance by AWG and kcmil size using area-derived resistance at 20 C.

Scroll sideways to keep row labels aligned with hidden columns.

Formula basis: resistance = resistivity x length / area, using aluminum resistivity 0.028264 ohm mm2/m at 20 C.
Conductor sizeOhms / 1000 mOhms / 1000 ftBasis
14 AWG13.58854.1418aluminum, 2.08 mm2 area
12 AWG8.5392.6027aluminum, 3.31 mm2 area
10 AWG5.37341.6378aluminum, 5.26 mm2 area
8 AWG3.37681.0293aluminum, 8.37 mm2 area
6 AWG2.12510.6477aluminum, 13.3 mm2 area
4 AWG1.33320.4064aluminum, 21.2 mm2 area
3 AWG1.05860.3227aluminum, 26.7 mm2 area
2 AWG0.84120.2564aluminum, 33.6 mm2 area
1 AWG0.66660.2032aluminum, 42.4 mm2 area
1/0 AWG0.52830.161aluminum, 53.5 mm2 area
2/0 AWG0.41930.1278aluminum, 67.4 mm2 area
3/0 AWG0.33250.1014aluminum, 85 mm2 area
4/0 AWG0.26370.0804aluminum, 107.2 mm2 area
250 kcmil0.22310.068aluminum, 126.7 mm2 area
300 kcmil0.18590.0567aluminum, 152 mm2 area
350 kcmil0.15940.0486aluminum, 177.3 mm2 area
400 kcmil0.13940.0425aluminum, 202.7 mm2 area
500 kcmil0.11150.034aluminum, 253.4 mm2 area
600 kcmil0.0930.0283aluminum, 304 mm2 area
750 kcmil0.07440.0227aluminum, 380 mm2 area
1000 kcmil0.05580.017aluminum, 506.7 mm2 area
Notes
  • Check table values for preliminary lookup and arithmetic checks only.
  • Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.