Energy Conversion Calculator
Easily handle converting energy units, joules, microjoules, kilojoules, etc, with our precise energy conversion calculator. Get fast, accurate results
Result1,000 mJ1 J converted
1 J equals1,000 mJ
1 mJ equals0.001 J
Joule to millijoule reference
| joule | millijoule |
|---|---|
| 1 J | 1,000 mJ |
| 2 J | 2,000 mJ |
| 5 J | 5,000 mJ |
| 10 J | 10,000 mJ |
| 25 J | 25,000 mJ |
| 50 J | 50,000 mJ |
| 100 J | 100,000 mJ |
| 500 J | 500,000 mJ |
| 1,000 J | 1,000,000 mJ |
How to convert joule to millijoule
One joule equals 1000 mJ, so multiply the number of joules by 1000:
mJ = J × 1000
Going the other way
One millijoule equals 0.001 J, so to convert back:
J = mJ × 0.001
Both directions are shown in the results above, and the drop-downs let you convert between any pair of energy units — not just these two.