About this calculator
Convert joules, kilojoules, watt-hours and kilowatt-hours.
Useful for electricity and energy calculations.
Formula
All values convert through joules. 1Wh = 3,600J.
Example
1kWh = 3.6MJ.
Accuracy
NUMTX shows the assumptions next to the calculation so you can replace defaults with values that match your situation. For measurements, supplier rates, fees, interest, tax or regulated work, confirm important figures with the appropriate official or professional source.