MyCalculatorHow it works
Energy in kWh is (Watts × Hours) ÷ 1000.
Example
A 2,000W appliance used for 2 hours consumes 4 kWh.
Assumptions & limitations
This is a pure unit conversion and doesn't include cost — pair it with your local electricity rate, or use our electricity cost calculator for a cost estimate directly.
Frequently asked questions
What's the difference between this and the electricity cost calculator?
This tool converts power and time into energy only. The electricity cost calculator does the same conversion plus multiplies by your electricity rate to show cost.