Conductor Resistance Formula
A conductor's resistance comes from its material's resistivity, scaled by its length and cross-sectional area. Longer, thinner conductors have more resistance; shorter, thicker ones have less.
Formula
R = (ρ × L) ÷ A
- R
- Resistance, in ohms
- ρ
- Resistivity of the conductor material
- L
- Conductor length, in meters
- A
- Cross-sectional area, in square millimeters