Amps to Watts Calculator
Convert amps and volts into watts. Enter the voltage and current to see power in watts, kilowatts and the energy used over one hour.
How it works
Electrical power (watts) equals voltage (volts) multiplied by current (amps). Kilowatts are watts divided by 1,000.
Watts = Volts × AmpsWorked examples
Example
A 230-volt appliance drawing 10 amps uses 2,300 watts, or 2.3 kW.
Frequently asked questions
How do I convert amps to watts?
Multiply amps by volts: watts = amps × volts.
What is a kilowatt-hour?
A kWh is the energy used by a 1,000-watt device running for one hour.
What voltage should I use?
Household mains is 230 V in Tanzania and most of the world, and 120 V in North America.
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