Watts Amps Volts Calculator is an electrical power calculator to calculate and convert to or from any of the following, Watts, Amps & Volts (single phase) and kW, Amps, Volts and Power Factor (three phase) using this advanced electrical calculator. An electrical power converter / electrical calculator for single and three phase electrical formulas. SINGLE PHASE CALCULATIONS: - Watts - Amps - Volts THREE PHASE CALCULATIONS: - kW - Amps - Volts - Power Factor How to use: - Single Phase Power Calculator 1) Enter any two values to calculate the third. 2) Press calculate. - Three Phase Power Calculator 1) Enter any three values to calculate the fourth. 2) Press calculate.