Convert Watt-hour to Kilowatt-hour

One Wh equals 0.001 kWh. This converter allows you to easily convert between Watt-hour and Kilowatt-hour in real time.

Formula

Wh × 0.001 = kWh

Example: 1 Wh = 0.001 kWh

What is Watt-hour?

The watt-hour is a unit of energy equal to 3,600 joules, representing the energy used by one watt of power over one hour. It is commonly used for portable battery capacities; a typical power bank rated at 5,000 mAh at 3.7 V holds about 18.5 Wh. Airline regulations for lithium-ion batteries are also specified in watt-hours, with batteries under 100 Wh generally permitted in carry-on luggage.

What is Kilowatt-hour?

The kilowatt-hour equals 1,000 watt-hours and is the standard billing unit for household electricity. An average Japanese household uses about 300 kWh per month, and electricity costs roughly 25 to 40 yen per kWh. Electric vehicle batteries range from about 40 to 100 kWh, providing approximately 6 to 8 km of range per kWh. Solar panel output is also measured in kWh.