Convert Joule to Kilowatt-hour

One J equals 2.777777778e-7 kWh. This converter allows you to easily convert between Joule and Kilowatt-hour in real time.

Formula

J × 2.777777778e-7 = kWh

Example: 1 J = 2.777777778e-7 kWh

What is Joule?

The joule is the SI unit of energy, named after English physicist James Prescott Joule. One joule equals the work done by a force of one newton moving an object one meter, or the energy used by one watt of power for one second. Food energy labels in many countries show kilojoules alongside calories. In physics, the joule unifies mechanical, thermal, and electrical energy into a single consistent unit.

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.