Kilowatt-hours to Joules Converter
Enter a value in kilowatt-hours to convert it to joules, megajoules.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
A kilowatt-hour is the energy delivered by one kilowatt of power sustained for one hour, which converts exactly to SI energy units as 1 kWh = 3.6×10⁶ joules = 3.6 megajoules, since a watt is one joule per second and an hour holds 3,600 seconds.
Utility companies bill electricity in kWh because it's a practical, human-scaled unit for metering household and industrial consumption, while physicists and engineers work natively in joules (the SI unit of energy); converting between the two is routine whenever an energy bill, battery capacity, or appliance rating needs to be compared against a physics calculation done in joules.
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