Wire Gauge Calculator
Determine the recommended AWG wire gauge based on current, distance, voltage, and acceptable voltage drop.
Inputs
A
ft
%
Results
Recommended AWG
12
Actual Voltage Drop3.18 V
Drop Percentage2.65%
Power Loss63.5 W
Total Wire Length100 ft
How to Use This Calculator
- Enter the Current (amps) the wire must carry.
- Set One-Way Distance (ft) to the load.
- Select System Voltage (120V or 240V).
- Enter Max Voltage Drop (%) — NEC recommends 3% for branch circuits, 5% total.
- Review Recommended AWG and Actual Voltage Drop to confirm the wire is adequately sized.
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