Electrical Calculators

A collection of free, easy-to-use electrical engineering tools. Designed for professionals, students, and DIYers to get accurate results quickly.

Voltage Drop Calculator

Calculate voltage drop for electrical cables quickly and accurately.

Calculate voltage, current, resistance, and power.

Convert power in watts or kW to electrical current in amps.

Convert electrical current in amps to power in watts or kW.

Convert apparent power (kVA) to real power (kW) and reactive power (kVAR).