Convert kilojoules to megajoules
1 kJ = 0.001 MJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.001MJ
As a fraction: 1/1000
1 kJ = 0.001 MJ
How to convert kilojoules to megajoules
Multiply the number of kilojoules by 0.001 to get megajoules.
The exact factor is 0.001 — as a fraction, 1/1000.
Kilojoule to Megajoule conversion table
| Kilojoules (kJ) | Megajoules (MJ) |
|---|---|
| 1 kJ | 0.001 |
| 2 kJ | 0.002 |
| 3 kJ | 0.003 |
| 5 kJ | 0.005 |
| 10 kJ | 0.01 |
| 20 kJ | 0.02 |
| 25 kJ | 0.025 |
| 50 kJ | 0.05 |
| 100 kJ | 0.1 |
| 250 kJ | 0.25 |
| 500 kJ | 0.5 |
| 1000 kJ | 1 |
Megajoule to Kilojoule conversion table
| Megajoules (MJ) | Kilojoules (kJ) |
|---|---|
| 1 MJ | 1000 |
| 2 MJ | 2000 |
| 3 MJ | 3000 |
| 5 MJ | 5000 |
| 10 MJ | 10 000 |
| 20 MJ | 20 000 |
| 25 MJ | 25 000 |
| 50 MJ | 50 000 |
| 100 MJ | 100 000 |
| 250 MJ | 250 000 |
| 500 MJ | 500 000 |
| 1000 MJ | 1 000 000 |
Frequently asked
How many megajoules are in a kilojoule?
One kilojoule equals 0.001 megajoules (kJ → MJ). That figure is exact, not rounded.
How do you convert kilojoules to megajoules?
Multiply the number of kilojoules by 0.001 to get megajoules.
What is 1 MJ in kilojoules?
One megajoule is 1000 kilojoules.
What is 10 kJ in MJ?
10 kJ = 0.01 MJ.