Convert Kilojoule to Megajoule
1 kilojoule = 0.001 megajoule (MJ). For example, 10 kilojoule = 0.01 megajoule and 100 kilojoule = 0.1 megajoule. Type any value below to convert kilojoule to megajoule both ways — it runs entirely in your browser.
Kilojoule to Megajoule conversion formula
To convert kilojoule to megajoule, multiply by 0.001:
megajoule = kilojoule × 0.001
Going the other way, 1 megajoule = 1,000 kilojoule, so
kilojoule = megajoule × 1,000.
Kilojoule to Megajoule — worked examples
| Kilojoule | Megajoule |
|---|---|
| 1 kJ | 0.001 MJ |
| 2 kJ | 0.002 MJ |
| 3 kJ | 0.003 MJ |
| 5 kJ | 0.005 MJ |
| 10 kJ | 0.01 MJ |
| 25 kJ | 0.025 MJ |
| 50 kJ | 0.05 MJ |
| 100 kJ | 0.1 MJ |
Kilojoule ↔ Megajoule reference table
| Kilojoule → Megajoule | Megajoule → Kilojoule |
|---|---|
| 1 kJ = 0.001 MJ | 1 MJ = 1,000 kJ |
| 2 kJ = 0.002 MJ | 2 MJ = 2,000 kJ |
| 5 kJ = 0.005 MJ | 5 MJ = 5,000 kJ |
| 10 kJ = 0.01 MJ | 10 MJ = 10,000 kJ |
| 20 kJ = 0.02 MJ | 20 MJ = 20,000 kJ |
| 50 kJ = 0.05 MJ | 50 MJ = 50,000 kJ |
| 100 kJ = 0.1 MJ | 100 MJ = 100,000 kJ |
| 250 kJ = 0.25 MJ | 250 MJ = 250,000 kJ |
| 500 kJ = 0.5 MJ | 500 MJ = 500,000 kJ |
| 1000 kJ = 1 MJ | 1000 MJ = 1,000,000 kJ |
About kilojoule and megajoule
Kilojoule: A kilojoule is 1,000 joules — the energy unit on food labels (shown next to kilocalories) and for everyday amounts of energy.
Megajoule: A megajoule is 1,000,000 joules (1,000 kJ) — used for larger energy quantities such as the energy content of fuels.
Frequently asked questions
- How many megajoule are in 1 kilojoule?
- 1 kilojoule = 0.001 megajoule (MJ).
- How do I convert kilojoule to megajoule?
- Multiply the number of kilojoule by 0.001. For example, 10 kilojoule = 10 × 0.001 = 0.01 megajoule.
- How many kilojoule are in 1 megajoule?
- 1 megajoule = 1,000 kilojoule.
- Which is bigger, kilojoule or megajoule?
- 1 megajoule equals 1,000 kilojoule, so a megajoule is the larger unit.