ENERGY CONVERSION
Watt-hour to Megajoule.
Convert watt-hour (Wh) to megajoule (MJ), with the math explained.
THE MATH, MADE SIMPLE
How to convert watt-hour to megajoule
Multiply your watt-hour value by 0.0036 to get the equivalent in megajoule. Both units are normalized through the joule.
MJ = Wh × 0.003610 Wh = 0.036 MJ
Result rounded to 12 significant digits. Change the precision in the calculator to suit your task.QUICK REFERENCE
Wh to MJ conversion table
| Watt-hour (Wh) | Megajoule (MJ) |
|---|---|
| 1 Wh | 0.0036 MJ |
| 2 Wh | 0.0072 MJ |
| 5 Wh | 0.018 MJ |
| 10 Wh | 0.036 MJ |
| 20 Wh | 0.072 MJ |
| 50 Wh | 0.18 MJ |
| 100 Wh | 0.36 MJ |
| 500 Wh | 1.8 MJ |
| 1,000 Wh | 3.6 MJ |
About the watt-hour
The watt-hour (Wh) is a unit of energy. One watt-hour equals 3,600 joule (base unit) in this calculator.
All watt-hour conversionsAbout the megajoule
The megajoule (MJ) is a unit of energy. One megajoule equals 1,000,000 joule (base unit) in this calculator.
All megajoule conversionsCommon questions
What is 1 Wh in MJ?
One watt-hour equals 0.0036 MJ. Use the formula above for other values.
Why might another calculator show a different last digit?
Calculators may round at different stages or use different unit conventions. We keep full JavaScript numeric precision during calculation and round only for display. Choose up to 15 significant digits. Check US versus UK units and the notes for this category.
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