Millijoules to Watt Hours Converter
EngineeringJoules, calories, kilowatt-hours and more.
How to convert Millijoules to Watt Hours
Multiply the millijoules value by 2.7778e-7: 1 mJ = 2.7778e-7 Wh. Going the other way, 1 Wh = 3.6e+6 mJ, so divide by 2.7778e-7 or use the Watt Hours to Millijoules converter.
About these units
Watt Hours (Wh)
A watt-hour is the energy of one watt sustained for one hour, exactly 3,600 joules. Phone and laptop batteries are rated in watt-hours.
Millijoules to Watt Hours conversion table
| Millijoules (mJ) | Watt Hours (Wh) |
|---|---|
| 1 mJ | 2.7778e-7 Wh |
| 2 mJ | 5.5556e-7 Wh |
| 3 mJ | 8.3333e-7 Wh |
| 4 mJ | 1.1111e-6 Wh |
| 5 mJ | 1.3889e-6 Wh |
| 10 mJ | 2.7778e-6 Wh |
| 20 mJ | 5.5556e-6 Wh |
| 25 mJ | 6.9444e-6 Wh |
| 50 mJ | 1.3889e-5 Wh |
| 100 mJ | 2.7778e-5 Wh |
| 500 mJ | 0.000138889 Wh |
| 1,000 mJ | 0.000277778 Wh |
More millijoules conversions
- Millijoules to Joules1 mJ = 0.001 J
- Millijoules to Kilojoules1 mJ = 1e-6 kJ
- Millijoules to Megajoules1 mJ = 1e-9 MJ
- Millijoules to Gigajoules1 mJ = 1e-12 GJ
- Millijoules to Microjoules1 mJ = 1,000 µJ
- Millijoules to Nanojoules1 mJ = 1e+6 nJ
- Millijoules to Calories1 mJ = 0.000239006 cal
- Millijoules to British Thermal Units1 mJ = 9.4781e-7 BTU
- Millijoules to Ergs1 mJ = 10,000 erg
See every unit on the Energy Converter.