What Is the Formula for Converting Watts to Amps?

By Staff WriterLast Updated Mar 25, 2020 1:45:20 PM ET

The simplest conversion formula to convert watts to amps is based on the formula for amps, which is power (in Watts) divided by Volts. This is written as I(Amps) = P(Watts) / V(Volts). By simply rearranging this formula, it is easy to convert amps to watts and vice versa.

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This is the simplest formula involving amp and watt calculation. There are several more complicated formulae for AC single phase watts-to-amps calculation, AC three phase watts-to-amps calculation and amps calculation with line-to-line voltage. These formulae involve more complex equations and a greater understanding of physics and are specific to those situations.