How Many Amps Does 1500 Watts Use?

By Staff WriterLast Updated August 04, 2015

Using Ohm’s Law, 1500 watts of energy uses 12.5 amps. Ohm’s Law defines the relationship between amps, watts and resistance. In the United States, electricity has a resistance of 120 volts.

The relationship defined by Ohm’s Law is:

I = V / R

I is the current in amps, V is voltage in watts and R is resistance in volts.

An amp measures the amount of electrical charge that passes through a point in a circuit. A volt represents the potential for energy movement, similar to water pressure in a pipe. A watt is a unit of power, measuring work done when 1 amp flows through 1 volt of electrical potential difference.

In other countries that utilize voltage of 220 watts, 1500 watts would use 6.81 amps.