Convert kilojoule to watt-hour
1 kJ = 0.2777777778 Wh
1 kJ = 0.278 Wh
1 kJ in every energy unit
| joule | 1,000 J |
| kilojoule | 1 kJ |
| megajoule | 0.001 MJ |
| calorie | 239 cal |
| kilocalorie | 0.239 kcal |
| watt-hour | 0.278 Wh |
| kilowatt-hour | 0.000278 kWh |
| British thermal unit | 0.948 BTU |
| foot-pound | 738 ft⋅lb |
| electron volt | 6.24e+21 eV |
| kiloelectron volt | 6.24e+18 keV |
| megaelectron volt | 6.24e+15 MeV |
How the conversion works
Multiply by 0.2777777778 to go from kilojoule to watt-hour, or divide by it to go back. Every conversion on this site routes through the SI value (J) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? watt-hour to kilojoule — 1 Wh = 3.6 kJ.
kilojoule to watt-hour — common values
| 1 kJ | 0.27777778 Wh |
| 2 kJ | 0.55555556 Wh |
| 3 kJ | 0.83333333 Wh |
| 5 kJ | 1.3888889 Wh |
| 10 kJ | 2.7777778 Wh |
| 15 kJ | 4.1666667 Wh |
| 20 kJ | 5.5555556 Wh |
| 25 kJ | 6.9444444 Wh |
| 50 kJ | 13.888889 Wh |
| 75 kJ | 20.833333 Wh |
| 100 kJ | 27.777778 Wh |
| 250 kJ | 69.444444 Wh |
| 500 kJ | 138.88889 Wh |
| 1000 kJ | 277.77778 Wh |