Ohm's Law and Wire Gauge Calculator
Choose 2 Known Values
Feet Wire Length
Choose 2 known values, example a 35 watt lightbulb @ 13.5 volts.
Enter in the TOTAL length of wire in the circuit and choose a wire size.
If the percent drop is ABOVE 3%, the wire is too small for the circuit.
Note 18 AWG is smaller wire than 12 AWG.
This calculator is supplied as a convenience and intended to be used for estimates only.
We make no warranties, implied or expressed, to the accuracy of any data or calculations presented here.
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