## Wire Size/Weight Calculator

Use this calculator when you want to choose which gauge wire to use for your small application (like radio controlled aircraft). This calculator will estimate the power lost in the wire and the weight of the wire (copper weight only). If you have any questions about cable or harness testing call us toll-free 1-800-441-9910.

Wire gauge
Step 1: Define the Load The Load Step 2: Compare Different Wires Peak load current (I)(Amps) Max source voltage (Vs)(volts) Length UnitsFeetInchesWire length from source to load ___ ohms Point B:  Length Gauge12131415161718192021222324252627282930 ___ ohms Contact resistance from fixture to DUT: At Point A: ohms ___ ohms At Point B: ohms ___ ohms Wire in DUT: Length Gauge12131415161718192021222324252627282930 ___ ohms Expected resistance of: A 2-wire measurement: ___ ohms A 4-wire measurement (points combine at A and B): ___ ohms 4-wire measurement (points combine on DUT): ___ ohms Wire Resistance % Wire Length % Max Temperature ° ___% °F or °CFC Accuracy of Tester   Percent of reading %   Fixed error ohms Highest Expected Resistance for 2-wire: ___ ohms Highest Expected Resistance for 4-wire (points combine at A and B): ___ ohms Highest Expected Resistance for true 4-wire (points combine on DUT): ___ ohms