guage of wire needed for 220
Free calculate electrical resistance of a wire from material properties, length, and cross-sectional area using r = ρl/a.
Input Parameters
Or enter AWG gauge below
Results
Enter parameters to calculate wire resistance
Resistance Formula
Resistance Equation
R = ρ × L / A
Where R = resistance, ρ = resistivity, L = length, A = cross-sectional area
Common Resistivities (20°C)
- • Silver: 1.59×10⁻⁸ Ω·m
- • Copper: 1.68×10⁻⁸ Ω·m
- • Gold: 2.44×10⁻⁸ Ω·m
- • Aluminum: 2.65×10⁻⁸ Ω·m