Kilowatt-hours to Watt-hours converter

To convert kilowatt-hours to watt-hours, enter the value in the first field. The result in watt-hours is calculated automatically using the exact conversion factor.

1 kWh = 1000 Wh
1 Wh = 0.001 kWh

Formula: Wh = kWh × 1000
kWh = Wh × 0.001

Definitions: 1 kWh = 1000 Wh; 1 Wh = 3600 J

The kilowatt-hour (kWh) is the energy of one kilowatt working for one hour, or 3.6 million joules. It is the unit on household electricity bills and is used for electric-vehicle battery capacity and consumption.

The watt-hour (Wh) is the energy of one watt working for one hour, exactly 3,600 joules. It is used for the capacity of phone, laptop and power bank batteries and for small amounts of electricity.

See the conversion table with commonly used values, handy for quick reference or study.