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Watt-hours to Gigajoules Converter

Convert watt-hours (Wh) to gigajoules (GJ), 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
3.6 × 10⁻⁶ GJ
joules (watt-seconds)
3,600 J
kilojoules
3.6 kJ
megajoules
0.0036 MJ
calories (thermochemical)
860.420650096 cal
kilocalories (food Calories)
0.860420650096 kcal
megacalories
0.000860420650096 Mcal
kilowatt-hours
0.001 kWh
megawatt-hours
1 × 10⁻⁶ MWh
British thermal units (IT)
3.41214163313 Btu
million Btu
3.41214163313 × 10⁻⁶ MMBtu
therms (100,000 Btu)
3.41214163313 × 10⁻⁵ thm
quads (10¹⁵ Btu)
3.41214163313 × 10⁻¹⁵ quad
electronvolts
2.24694326681 × 10²² eV
kiloelectronvolts
2.24694326681 × 10¹⁹ keV
megaelectronvolts
2.24694326681 × 10¹⁶ MeV

1 Wh = 3.6 × 10⁻⁶ GJ

Show the working
  1. 1 Wh = 3.6e-6 GJ
  2. 1 × 3.6e-6 = 3.6e-6 GJ

How to convert watt-hours to gigajoules

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

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

Worked example:

1 Wh = 3.6e-6 GJ
5 × 3.6e-6 = 1.8e-5 GJ

Watt-hours to gigajoules table

Watt-hoursGigajoules
1 Wh3.6 × 10⁻⁶ GJ
2 Wh7.2 × 10⁻⁶ GJ
3 Wh1.08 × 10⁻⁵ GJ
4 Wh1.44 × 10⁻⁵ GJ
5 Wh1.8 × 10⁻⁵ GJ
6 Wh2.16 × 10⁻⁵ GJ
7 Wh2.52 × 10⁻⁵ GJ
8 Wh2.88 × 10⁻⁵ GJ
9 Wh3.24 × 10⁻⁵ GJ
10 Wh3.6 × 10⁻⁵ GJ
15 Wh5.4 × 10⁻⁵ GJ
20 Wh7.2 × 10⁻⁵ GJ
25 Wh9 × 10⁻⁵ GJ
30 Wh0.000108 GJ
40 Wh0.000144 GJ
50 Wh0.00018 GJ
75 Wh0.00027 GJ
100 Wh0.00036 GJ
250 Wh0.0009 GJ
500 Wh0.0018 GJ
1000 Wh0.0036 GJ

About the units

Formula version 0.1.0Reviewed