Enter megajoules or kilowatt-hours into the calculator to convert to the other value.

Megajoules to Kwh Conversion Calculator

Enter exactly 1 value to calculate the other

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Megajoules to kWh Formula

The following formulas convert megajoules (MJ) to kilowatt-hours (kWh) and back using the exact SI relationship between joules and watt-hours.

\mathrm{kWh} = \frac{\mathrm{MJ}}{3.6}
  • 1 Wh = 3600 J (exact)
  • 1 kWh = 3.6 × 106 J
  • 1 MJ = 106 J
  • 1 kJ = 1000 J; 1 GJ = 109 J; 1 MWh = 3.6 × 109 J

Megajoules to kWh Conversion Table

Megajoules to Kilowatt-hours
Megajoules (MJ) Kilowatt-hours (kWh)
0.100.028
0.250.069
0.500.139
0.750.208
10.278
20.556
30.833
41.111
51.389
7.52.083
102.778
123.333
154.167
205.556
256.944
308.333
4011.111
5013.889
7520.833
10027.778
* Exact: 1 kWh = 3.6 MJ and 1 MJ = 0.277778 kWh.

How do you convert MJ to kWh? Divide megajoules by 3.6 to get kilowatt-hours (kWh = MJ ÷ 3.6).

How do you convert kWh to MJ? Multiply kilowatt-hours by 3.6 to get megajoules (MJ = kWh × 3.6).

Example Problem

Convert 12 MJ to kWh.

Use the formula: kWh = MJ ÷ 3.6.

kWh = 12 ÷ 3.6 = 3.333 kWh