Kilowatt-hours to Megajoules

Convert kWh to MJ instantly — with a table, common energy values, and a live calculator.

1 kWh equals 3.6 MJ.

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Result (MJ)3.6 MJ

kWh to MJ table

kWhMJ
1 kWh3.6 MJ
2 kWh7.2 MJ
3 kWh10.8 MJ
5 kWh18 MJ
10 kWh36 MJ
15 kWh54 MJ
20 kWh72 MJ
25 kWh90 MJ
30 kWh108 MJ
40 kWh144 MJ
50 kWh180 MJ
60 kWh216 MJ
75 kWh270 MJ
90 kWh324 MJ
100 kWh360 MJ
120 kWh432 MJ
150 kWh540 MJ
200 kWh720 MJ
250 kWh900 MJ
300 kWh1080 MJ
400 kWh1440 MJ
500 kWh1800 MJ

MJ to kWh (reverse)

MJkWh
1 MJ0.278 kWh
2 MJ0.556 kWh
3 MJ0.833 kWh
5 MJ1.39 kWh
10 MJ2.78 kWh
15 MJ4.17 kWh
20 MJ5.56 kWh
25 MJ6.94 kWh
30 MJ8.33 kWh
40 MJ11.11 kWh
50 MJ13.89 kWh
60 MJ16.67 kWh
75 MJ20.83 kWh
90 MJ25 kWh
100 MJ27.78 kWh
120 MJ33.33 kWh
150 MJ41.67 kWh
200 MJ55.56 kWh
250 MJ69.44 kWh
300 MJ83.33 kWh
400 MJ111.11 kWh
500 MJ138.89 kWh

Common energy values

kWhMJ
5 kWh18 MJ
10 kWh36 MJ
25 kWh90 MJ
50 kWh180 MJ
75 kWh270 MJ
100 kWh360 MJ
120 kWh432 MJ
150 kWh540 MJ
200 kWh720 MJ
300 kWh1080 MJ
400 kWh1440 MJ
500 kWh1800 MJ

How it scales

901802703600255075100kWh

1 kWh in other units

860kcal3.6MJ3412BTU1000Wh

The ratio at a glance

1 kWh3.6 MJ

Joules, kWh, and calories — the key energy units

Joules (J), kilojoules (kJ), and megajoules (MJ) are the SI units of energy. The kilowatt-hour (kWh) is the unit on your electricity bill and equals 3.6 MJ. With calories there are two sizes that must not be confused: the kilocalorie (kcal) on nutrition labels equals exactly 4184 J (4.184 kJ), while the small calorie (cal) is only 4.184 J — they differ by a factor of 1000. The BTU (British thermal unit) equals 1055.06 J and is used in heating and air-conditioning.

Energy conversions are exact and rest on fixed factors — for more unit pairs, use our energy conversion hub.

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Frequently asked questions

How many MJ are in 1 kWh?

1 kWh equals 3.6 MJ.

How many MJ are in 2 kWh?

2 kWh equal 7.2 MJ.

How do I convert kWh to MJ?

Multiply the energy in kWh by 3.6 to get MJ.

Is the kWh-to-MJ conversion exact?

Yes. Energy conversions are exact; the values here are only rounded to two decimal places.

What are these energy units used for?

Joules (J), kilojoules (kJ), and megajoules (MJ) are the SI units of energy. The kilowatt-hour (kWh) is the unit on your electricity bill, kilocalories (kcal) appear on food labels, and the BTU (British thermal unit) is used in heating and air-conditioning.

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