kWh Calculator
Calculates energy consumption in kilowatt-hours from power and usage time.
Lilu Baba's kWh Calculator converts a device's power rating and usage time into total energy consumed, in kilowatt-hours.
How to use this calculator
- Enter the device's power rating in watts.
- Enter how many hours it runs.
- Energy consumed in kWh updates instantly.
Energy Used (kWh)
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FAQ
kWh Calculator — frequently asked questions
kWh = (Watts × Hours) ÷ 1000.
Because a kilowatt-hour is 1000 watt-hours, so wattage must be converted to kilowatts first.