Aluminum and Copper Wires - Electrical Resistance vs. Cross-Sectional Area

Electrical resistance in plain copper or aluminum wires.

Wire Material	Length (m)	Cross-Sectional Area (mm²)	Resistivity (Ω·mm²/m)	Resistance (Ω)
Copper	100	1	0.0172	1.72
Copper	100	2.5	0.0172	0.688
Copper	100	4	0.0172	0.43
Copper	100	6	0.0172	0.287
Copper	100	10	0.0172	0.172
Aluminum	100	1	0.0282	2.82
Aluminum	100	2.5	0.0282	1.128
Aluminum	100	4	0.0282	0.705
Aluminum	100	6	0.0282	0.47
Aluminum	100	10	0.0282	0.282

Calculator

Wire Material

Length (m)

Cross-Sectional Area (mm²)

Resistivity-- Ω·mm²/m

Resistance-- Ω