Battery Building Tools Analyze & Validate

Wire Resistance Calculator

Calculate wire resistance and voltage drop for common conductor materials and gauges.

1Wire parameters
2Calculation results
Within target

Estimated drop is 0.51% against a target of 1%.

Calculation Results

Wire specs, formula inputs, and the resulting total resistance.

Total Resistance0.012297615 Ω
Voltage Drop0.061 V
Drop Percentage0.51%

Wire Specifications

Length
5.00 ft / 1.52 m
Gauge
AWG 14
Diameter
0.0641 in / 0.0016 m
Material
Copper

Resistance Formula

R = ρ × (L ÷ A)

  • ρ = 1.6800e-8 Ω·m
  • L = 1.52 m
  • A = 2.0820e-6 m²

How to use the result

If voltage drop is already too high in this estimate, the next move is usually a shorter run, a thicker conductor, or a better conductor material.

In battery systems, this number is a planning baseline. You still need to verify ampacity, insulation type, fusing, and installation safety separately.