Electrical Calculators
Calculate wire size, voltage drop, ampacity, watts-to-amps, and breaker size.
Electrical calculators help you size wire, check voltage drop and ampacity, and pick a breaker. They give you the numbers to work safely on a circuit. Wire Size Calculator.
Wire Size CalculatorCalculate the correct wire size for a circuit based on amps, distance, and voltage. See AWG, ampacity, and voltage drop for copper or aluminum.Voltage Drop CalculatorCalculate voltage drop in an AC or DC circuit given wire gauge, voltage, current, and length. Also find the correct conductor size for your run.Ampacity CalculatorCalculate the safe current-carrying capacity of a wire.Watts to Amps CalculatorConvert between watts, amps, and volts.Breaker Size CalculatorDetermine the correct circuit breaker size.Electrical Cost CalculatorEstimate the cost of electrical work.