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Voltage Drop Calculator

Calculate the voltage drop over a run of M22759 wire. The resistance values are based on typical max DC resistance for tin-plated copper at 20°C.

System Voltage (V)

Current Load (Amps)

Wire Length (Feet, One-Way)

Wire Gauge (AWG)

To calculate manually, use the formula:

V_drop = Current × (Resistance_per_1000ft / 1000) × Length

Example (10A, 50ft, 20AWG): 10 × (9.77/1000) × 50 = 4.88V