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Gigajoules to Megawatt-hours Converter

Convert gigajoules (GJ) to megawatt-hours (MWh), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
0.277777777778 MWh
joules (watt-seconds)
1,000,000,000 J
kilojoules
1,000,000 kJ
megajoules
1,000 MJ
calories (thermochemical)
239,005,736.138 cal
kilocalories (food Calories)
239,005.736138 kcal
megacalories
239.005736138 Mcal
watt-hours
277,777.777778 Wh
kilowatt-hours
277.777777778 kWh
British thermal units (IT)
947,817.120313 Btu
million Btu
0.947817120313 MMBtu
therms (100,000 Btu)
9.47817120313 thm
quads (10¹⁵ Btu)
9.47817120313 × 10⁻¹⁰ quad
electronvolts
6.24150907446 × 10²⁷ eV
kiloelectronvolts
6.24150907446 × 10²⁴ keV
megaelectronvolts
6.24150907446 × 10²¹ MeV

1 GJ = 0.277777777778 MWh

Show the working
  1. 1 GJ = 0.277777777778 MWh
  2. 1 × 0.277777777778 = 0.277777777778 MWh

How to convert gigajoules to megawatt-hours

1 GJ = 0.277777777778 MWh, so multiply by 0.277777777778 to go from gigajoules to megawatt-hours. Going the other way, 1 MWh = 3.6 GJ.

MWh = GJ × 0.277777777778
GJ = MWh × 3.6

Worked example:

1 GJ = 0.277777777778 MWh
5 × 0.277777777778 = 1.38888888889 MWh

Gigajoules to megawatt-hours table

GigajoulesMegawatt-hours
1 GJ0.277777777778 MWh
2 GJ0.555555555556 MWh
3 GJ0.833333333333 MWh
4 GJ1.11111111111 MWh
5 GJ1.38888888889 MWh
6 GJ1.66666666667 MWh
7 GJ1.94444444444 MWh
8 GJ2.22222222222 MWh
9 GJ2.5 MWh
10 GJ2.77777777778 MWh
15 GJ4.16666666667 MWh
20 GJ5.55555555556 MWh
25 GJ6.94444444444 MWh
30 GJ8.33333333333 MWh
40 GJ11.1111111111 MWh
50 GJ13.8888888889 MWh
75 GJ20.8333333333 MWh
100 GJ27.7777777778 MWh
250 GJ69.4444444444 MWh
500 GJ138.888888889 MWh
1000 GJ277.777777778 MWh

About the units

Megawatt-hours (MWh)
Megawatt-hours, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).

Formula version 0.1.0Reviewed