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Watt-hours to Megajoules Converter

Convert watt-hours (Wh) to megajoules (MJ), 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
0.0036 MJ
joules (watt-seconds)
3,600 J
kilojoules
3.6 kJ
gigajoules
3.6 × 10⁻⁶ GJ
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 = 0.0036 MJ

Show the working
  1. 1 Wh = 0.0036 MJ
  2. 1 × 0.0036 = 0.0036 MJ

How to convert watt-hours to megajoules

1 Wh = 0.0036 MJ, so multiply by 0.0036 to go from watt-hours to megajoules. Going the other way, 1 MJ = 277.777777778 Wh.

MJ = Wh × 0.0036
Wh = MJ × 277.777777778

Worked example:

1 Wh = 0.0036 MJ
5 × 0.0036 = 0.018 MJ

Watt-hours to megajoules table

Watt-hoursMegajoules
1 Wh0.0036 MJ
2 Wh0.0072 MJ
3 Wh0.0108 MJ
4 Wh0.0144 MJ
5 Wh0.018 MJ
6 Wh0.0216 MJ
7 Wh0.0252 MJ
8 Wh0.0288 MJ
9 Wh0.0324 MJ
10 Wh0.036 MJ
15 Wh0.054 MJ
20 Wh0.072 MJ
25 Wh0.09 MJ
30 Wh0.108 MJ
40 Wh0.144 MJ
50 Wh0.18 MJ
75 Wh0.27 MJ
100 Wh0.36 MJ
250 Wh0.9 MJ
500 Wh1.8 MJ
1000 Wh3.6 MJ

About the units

Formula version 0.1.0Reviewed