Skip to content
DG KalkulátorCalculate. Understand. Decide.
HomeUnits & converters
Units & converters

Energy converter

Convert energy between joules, kilojoules, megajoules, watt hours, kilowatt hours and electronvolts.

Free & no registration Calculated in your browser
01

Your inputs

The starting values are an example.

Decimals: 12.5 · Thousands: 1,234.56. Follow the field instructions for lists.

02

Your result

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

Converted value = original value × source factor / target factor

Worked example

1 Kilowatt hour (kWh) = 3.6 Megajoule (MJ).

Things to check

  • 1 kWh equals 3.6 MJ. Energy in kWh and power in kW are different quantities.
  • Rounding is applied only to displayed results. Very small or very large values may appear in scientific notation.

Sources and references