Megajoules per kilogram to kilowatt-hours per kilogram
Type a value in MJ/kg to get it in kWh/kg instantly.
2.778kWh/kg
That's 11× as energetic as a lithium battery, while dry wood is 1.6× higher. To match a 60 kWh car battery you would need about 21.6 kg of it.
Convert the other way: kWh/kg to MJ/kg
What it means
How much energy per kilogram?
Figures are the higher heating value by mass. They ignore the weight of the tank, engine or fuel cell around them.
The math
How to convert MJ/kg to kWh/kg
To convert megajoules per kilogram to kilowatt-hours per kilogram, multiply by 0.277778.
Example: 10 MJ/kg × 0.277778 = 2.77778 kWh/kg.
In the other direction, 1 kWh/kg = 3.6 MJ/kg.
Every unit
Your energy density in every unit
Tables
MJ/kg to kWh/kg conversion table
| MJ/kg | kWh/kg |
|---|---|
| 0.5 MJ/kg | 0.138889 kWh/kg |
| 1 MJ/kg | 0.277778 kWh/kg |
| 2 MJ/kg | 0.555556 kWh/kg |
| 5 MJ/kg | 1.38889 kWh/kg |
| 10 MJ/kg | 2.77778 kWh/kg |
| 16 MJ/kg | 4.44444 kWh/kg |
| 20 MJ/kg | 5.55556 kWh/kg |
| 25 MJ/kg | 6.94444 kWh/kg |
| 30 MJ/kg | 8.33333 kWh/kg |
| 40 MJ/kg | 11.1111 kWh/kg |
| 46 MJ/kg | 12.7778 kWh/kg |
| 55 MJ/kg | 15.2778 kWh/kg |
| 120 MJ/kg | 33.3333 kWh/kg |
kWh/kg to MJ/kg conversion table
| kWh/kg | MJ/kg |
|---|---|
| 0.5 kWh/kg | 1.8 MJ/kg |
| 1 kWh/kg | 3.6 MJ/kg |
| 2 kWh/kg | 7.2 MJ/kg |
| 5 kWh/kg | 18 MJ/kg |
| 10 kWh/kg | 36 MJ/kg |
| 16 kWh/kg | 57.6 MJ/kg |
| 20 kWh/kg | 72 MJ/kg |
| 25 kWh/kg | 90 MJ/kg |
| 30 kWh/kg | 108 MJ/kg |
| 40 kWh/kg | 144 MJ/kg |
| 46 kWh/kg | 165.6 MJ/kg |
| 55 kWh/kg | 198 MJ/kg |
| 120 kWh/kg | 432 MJ/kg |
Quick answers
Quick answers
- How many kWh/kg is 1 MJ/kg?
- 1 MJ/kg is 0.277778 kWh/kg.
- How many kWh/kg is 10 MJ/kg?
- 10 MJ/kg is 2.77778 kWh/kg.
The units
About these units
Megajoules per kilogram (MJ/kg)
The standard unit for fuels. Petrol is 46, wood 16.
Kilowatt-hours per kilogram (kWh/kg)
The battery industry’s unit. 1 kWh/kg is 3.6 MJ/kg.
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