Convert kilojoule to megajoule
1 kJ = 0.001 MJ
1 kJ = 0.001 MJ
1 kJ in every energy unit
| joule | 1,000 J |
| kilojoule | 1 kJ |
| megajoule | 0.001 MJ |
| calorie | 239 cal |
| kilocalorie | 0.239 kcal |
| watt-hour | 0.278 Wh |
| kilowatt-hour | 0.000278 kWh |
| British thermal unit | 0.948 BTU |
| foot-pound | 738 ft⋅lb |
| electron volt | 6.24e+21 eV |
| kiloelectron volt | 6.24e+18 keV |
| megaelectron volt | 6.24e+15 MeV |
How the conversion works
Multiply by 0.001 to go from kilojoule to megajoule, or divide by it to go back. Every conversion on this site routes through the SI value (J) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? megajoule to kilojoule — 1 MJ = 1,000 kJ.
kilojoule to megajoule — common values
| 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 |
| 15 kJ | 0.015 MJ |
| 20 kJ | 0.02 MJ |
| 25 kJ | 0.025 MJ |
| 50 kJ | 0.05 MJ |
| 75 kJ | 0.075 MJ |
| 100 kJ | 0.1 MJ |
| 250 kJ | 0.25 MJ |
| 500 kJ | 0.5 MJ |
| 1000 kJ | 1 MJ |