Convert Joules to Millijoules

Joules → Millijoules
J × 1000 = mJ mJ × 0.001 = J

To convert joules (J) to millijoules (mJ), multiply the joules value by 1000. 1 J = 1000 mJ, and 1 mJ = 0.001 J. The conversion is a linear scaling with no offset, so the same factor applies to any value.

Going the other way? Convert mJ to J.

J to mJ table
Joules (J) Millijoules (mJ)
0.1 J 100 mJ
0.5 J 500 mJ
1 J 1000 mJ
2 J 2000 mJ
5 J 5000 mJ
10 J 10000 mJ
20 J 20000 mJ
50 J 50000 mJ
100 J 100000 mJ
500 J 500000 mJ
1000 J 1000000 mJ