ENERGY
Energy & work
Mechanical, electrical, thermal and particle energy.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result277.778 Wh1 MJ = 277.778 Wh
EVERYDAY · ENGINEERING · SCIENCE
MJ to Wh Converter
Convert megajoule (MJ) to watt-hour (Wh). Enter a value for an instant result, or use the examples and reverse conversion below.
520units ready to convert
HOW IT IS CALCULATED
Convert through joule
Enter a megajoule value to calculate watt-hour with full internal precision before display rounding.
Display PrecisionAuto · 6 significant digits
Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| ergfrom MJ | erg | 10000000000000 |
| microjoulefrom MJ | µJ | 1000000000000 |
| millijoulefrom MJ | mJ | 1000000000 |
| joulefrom MJ | J | 1000000 |
| kilojoulefrom MJ | kJ | 1000 |
| megajoulefrom MJ | MJ | 1 |
| gigajoulefrom MJ | GJ | 0.001 |
| watt-hourfrom MJ | Wh | 277.778 |
| kilowatt-hourfrom MJ | kWh | 0.277778 |
| megawatt-hourfrom MJ | MWh | 0.000277778 |
| thermochemical caloriefrom MJ | calₜₕ | 239006 |
| thermochemical kilocaloriefrom MJ | kcalₜₕ | 239.006 |
| International Table caloriefrom MJ | calIT | 238846 |
| International Table British thermal unitfrom MJ | BtuIT | 947.817 |
| U.S. thermfrom MJ | therm US | 0.00948043 |
| foot pound-forcefrom MJ | ft·lbf | 737562 |
| electronvoltfrom MJ | eV | 6.24151e24 |
| kiloelectronvoltfrom MJ | keV | 6.24151e21 |
| megaelectronvoltfrom MJ | MeV | 6.24151e18 |
| gigaelectronvoltfrom MJ | GeV | 6.24151e15 |
| ton of TNTfrom MJ | t TNT | 0.000239006 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
MJ to Wh Conversion Reference
Megajoule (MJ) and watt-hour (Wh) are units of energy & work. Use this page to convert in either direction.
Conversion Examples
| Megajoule (MJ) | Watt-hour (Wh) |
|---|---|
| 1 MJ | 277.778 Wh |
| 5 MJ | 1388.89 Wh |
| 10 MJ | 2777.78 Wh |
| 100 MJ | 27777.8 Wh |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
Wh to MJ (watt-hour to megajoule)
Related Energy & work Conversions
MJ to erg (megajoule to erg)MJ to µJ (megajoule to microjoule)MJ to mJ (megajoule to millijoule)MJ to J (megajoule to joule)MJ to kJ (megajoule to kilojoule)MJ to GJ (megajoule to gigajoule)MJ to kWh (megajoule to kilowatt-hour)MJ to MWh (megajoule to megawatt-hour)MJ to calₜₕ (megajoule to thermochemical calorie)MJ to kcalₜₕ (megajoule to thermochemical kilocalorie)MJ to calIT (megajoule to International Table calorie)MJ to BtuIT (megajoule to International Table British thermal unit)MJ to therm US (megajoule to U.S. therm)MJ to ft·lbf (megajoule to foot pound-force)MJ to eV (megajoule to electronvolt)MJ to keV (megajoule to kiloelectronvolt)MJ to MeV (megajoule to megaelectronvolt)MJ to GeV (megajoule to gigaelectronvolt)MJ to t TNT (megajoule to ton of TNT)