Battery Building Tools Analyze & Validate

Wire Resistance Calculator

Our wire resistance calculator helps you determine the electrical resistance and voltage drop in wires, which is crucial for designing safe and efficient electrical systems in your DIY battery projects.

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 Performance Analysis

End Voltage11.94V
Total Power Loss0.31W
Power Loss per Foot0.061W/ft
Efficiency99.5%

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.

How wire resistance is calculated

This calculator takes into account various factors that affect wire resistance:

  • Wire Length and Gauge: The longer the wire or smaller the gauge (higher AWG number), the higher the resistance. This tool helps you select the appropriate wire size for your application.
  • Material Selection: Different conducting materials have varying resistivity values. Compare copper, aluminum, and other metals to find the best conductor for your needs.
  • Voltage Drop Calculation: Understanding voltage drop is crucial for maintaining proper system performance. Our calculator helps ensure your wire selection meets acceptable voltage drop standards.