How Many Watts Equal One Amp?


At 115 volts of current, 115 watts is equal to one amp, but the number of watts to equal an amp varies based on the current. If using a 12-volt battery to power the circuit, 12 watts is equal to one amp.

The formula for electricity is I=P/V, where I is the current in amps, P is the power in watts and V is the voltage of the circuit. Increasing the voltage in a circuit decreases the number of amps required, thus operating a 115-watt load at 230 volts requires only half the current. This decrease in demand for current increases the capacity of the circuit.