How many kilojoules are in 1 kilowatt-hour?

1 kilowatt-hour equals 3600 kJ.

How do I convert kilojoules back to kilowatt-hours?

Use the reverse converter: 1 kilojoule equals 0.000277778 kWh.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert kilowatt-hours to kilojoules, multiply the value by 3600.

kJ = kWh × 3600

40 kWh × 3600 = 144000 kJ

Kilowatt-hour (kWh): The unit on household electricity bills. Equal to 3.6 megajoules.
Kilojoule (kJ): 1,000 joules; used for food energy in Australia, New Zealand and much of Europe.

How do I convert kilowatt-hours to kilojoules?: To convert kilowatt-hours to kilojoules, multiply the value by 3600.
How many kilojoules are in 1 kilowatt-hour?: 1 kilowatt-hour equals 3600 kJ.
How many kilojoules are in 10 kilowatt-hours?: 10 kWh equals 36000 kJ.
How do I convert kilojoules back to kilowatt-hours?: Use the reverse converter: 1 kilojoule equals 0.000277778 kWh.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.