Electrical Calculators
Size wires, check voltage drop, convert amps to watts, and estimate home electrical load. Free, instant, and based on standard electrical formulas.
Wire Size Calculator
What gauge wire do I need? Recommend AWG by amps, circuit length, and voltage (120V/240V).
Voltage Drop Calculator
Calculate voltage drop in % and volts for copper or aluminum wire runs at any length.
Amps to Watts Calculator
Convert amps to watts (and watts to amps) instantly for any voltage, AC or DC.
Breaker Size Calculator
What size breaker do I need? Recommended circuit breaker amperage for your load.
Electrical Load Calculator
Estimate total home electrical load in watts and VA from floor area, circuits, and appliances.