Kilowatt-hours per kilogram to megajoules per kilogram
Type a value in kWh/kg to get it in MJ/kg instantly.
36MJ/kg
That's 1.2× as energetic as butter, while diesel is 1.25× higher. To match a 60 kWh car battery you would need about 6 kg of it.
Convert the other way: MJ/kg to kWh/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 kWh/kg to MJ/kg
To convert kilowatt-hours per kilogram to megajoules per kilogram, multiply by 3.6.
Example: 10 kWh/kg × 3.6 = 36 MJ/kg.
In the other direction, 1 MJ/kg = 0.277778 kWh/kg.
Every unit
Your energy density in every unit
Tables
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 |
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 |
Quick answers
Quick answers
- How many MJ/kg is 1 kWh/kg?
- 1 kWh/kg is 3.6 MJ/kg.
- How many MJ/kg is 10 kWh/kg?
- 10 kWh/kg is 36 MJ/kg.
The units
About these units
Kilowatt-hours per kilogram (kWh/kg)
The battery industry’s unit. 1 kWh/kg is 3.6 MJ/kg.
Megajoules per kilogram (MJ/kg)
The standard unit for fuels. Petrol is 46, wood 16.
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