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MJ to kWh Converter (Megajoules to Kilowatt-Hours)

1 megajoule = 0.2777777778 kilowatt-hours. To convert MJ to kWh, multiply by 0.2777777778, or divide by 3.6.

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100 MJ = 27.778 kWh

1 MJ
0.2778 kWh
1 kWh
3.6 MJ
10 MJ
2.7778 kWh
100 MJ
27.7778 kWh

How to convert MJ to kWh

1 megajoule equals 0.2777777778 kilowatt-hours, so the conversion is a single multiplication.

kWh = MJ × 0.2777777778

Example: 150 MJ × 0.2777777778 = 41.667 kWh.

About the kilowatt-hour

Kilowatt-Hour (kWh)

A kilowatt-hour is 3.6 megajoules, the energy a 1 kW appliance uses in an hour. It's the unit on electricity bills.

1 megajoule in every energy unit

Kilocalories238.846 kcal
Kilojoules1,000 kJ
Joules1,000,000 J
Kilowatt-Hours0.2778 kWh
Calories238,845.897 cal
British Thermal Units947.817 Btu
Watt-Hours277.778 Wh
Gigajoules0.001 GJ
Megawatt-Hours0.0002778 MWh
Therms (US)0.00948 thm
Electronvolts6.242e24 eV
Foot-Pounds737,562.149 ft·lbf
Ergs10,000,000,000,000 erg
kWh to MJReverse conversionBTU to kWh1 Btu = 0.0002931 kWhkWh to BTU1 kWh = 3,412.1416 BtuTherms to kWh1 thm = 29.3001 kWhkWh to Therms1 kWh = 0.03413 thm

MJ to kWh FAQ

How many kilowatt-hours are in a megajoule?

1 megajoule = 0.2777777778 kilowatt-hours.

How many megajoules are in a kilowatt-hour?

1 kilowatt-hour = 3.6 megajoules.

How do I convert MJ to kWh?

Use kWh = MJ × 0.2777777778. For example, 10 MJ = 2.778 kWh.

Can I print this MJ to kWh chart?

Yes. Use "Print / Save PDF" next to the converter for a one-page chart, or "Download CSV" to open it in Excel or Google Sheets.