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Gigajoules to Watt-hours Converter

Convert gigajoules (GJ) to watt-hours (Wh), 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
277,777.777778 Wh
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
kilowatt-hours
277.777777778 kWh
megawatt-hours
0.277777777778 MWh
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 = 277,777.777778 Wh

Show the working
  1. 1 GJ = 277777.777778 Wh
  2. 1 × 277777.777778 = 277777.777778 Wh

How to convert gigajoules to watt-hours

1 GJ = 277,777.777778 Wh, so multiply by 277,777.777778 to go from gigajoules to watt-hours. Going the other way, 1 Wh = 3.6 × 10⁻⁶ GJ.

Wh = GJ × 277,777.777778
GJ = Wh × 3.6

Worked example:

1 GJ = 277777.777778 Wh
5 × 277777.777778 = 1388888.88889 Wh

Gigajoules to watt-hours table

GigajoulesWatt-hours
1 GJ277,777.777778 Wh
2 GJ555,555.555556 Wh
3 GJ833,333.333333 Wh
4 GJ1,111,111.11111 Wh
5 GJ1,388,888.88889 Wh
6 GJ1,666,666.66667 Wh
7 GJ1,944,444.44444 Wh
8 GJ2,222,222.22222 Wh
9 GJ2,500,000 Wh
10 GJ2,777,777.77778 Wh
15 GJ4,166,666.66667 Wh
20 GJ5,555,555.55556 Wh
25 GJ6,944,444.44444 Wh
30 GJ8,333,333.33333 Wh
40 GJ11,111,111.1111 Wh
50 GJ13,888,888.8889 Wh
75 GJ20,833,333.3333 Wh
100 GJ27,777,777.7778 Wh
250 GJ69,444,444.4444 Wh
500 GJ138,888,888.889 Wh
1000 GJ277,777,777.778 Wh

About the units

Formula version 0.1.0Reviewed