Joules to Millijoules Converter
EngineeringJoules, calories, kilowatt-hours and more.
How to convert Joules to Millijoules
Multiply the joules value by 1,000: 1 J = 1,000 mJ. Going the other way, 1 mJ = 0.001 J, so divide by 1,000 or use the Millijoules to Joules converter.
About these units
Joules (J)
The joule is the SI unit of energy: the work done by a force of one newton over one meter. Lifting a small apple one meter takes about one joule.
Joules to Millijoules conversion table
| Joules (J) | Millijoules (mJ) |
|---|---|
| 1 J | 1,000 mJ |
| 2 J | 2,000 mJ |
| 3 J | 3,000 mJ |
| 4 J | 4,000 mJ |
| 5 J | 5,000 mJ |
| 10 J | 10,000 mJ |
| 20 J | 20,000 mJ |
| 25 J | 25,000 mJ |
| 50 J | 50,000 mJ |
| 100 J | 100,000 mJ |
| 500 J | 500,000 mJ |
| 1,000 J | 1e+6 mJ |
More joules conversions
- Joules to Kilojoules1 J = 0.001 kJ
- Joules to Megajoules1 J = 1e-6 MJ
- Joules to Gigajoules1 J = 1e-9 GJ
- Joules to Microjoules1 J = 1e+6 µJ
- Joules to Nanojoules1 J = 1e+9 nJ
- Joules to Calories1 J = 0.239006 cal
- Joules to Watt Hours1 J = 0.000277778 Wh
- Joules to British Thermal Units1 J = 0.000947813 BTU
- Joules to Ergs1 J = 1e+7 erg
See every unit on the Energy Converter.