Convert kilojoule to watt-hour
1 kJ = 0.2777777778 Wh
1 kJ = 0.27778 Wh
1 kJ in every energy unit
| electron volt | 6.2415e+21 eV |
| hartree | 2.2937e+20 Eh |
| kiloelectron volt | 6.2415e+18 keV |
| megaelectron volt | 6.2415e+15 MeV |
| gigaelectron volt | 6,241,500,000,000 GeV |
| nanojoule | 1,000,000,000,000 nJ |
| erg | 10,000,000,000 erg |
| teraelectron volt | 6,241,500,000 TeV |
| microjoule | 1,000,000,000 µJ |
| millijoule | 1,000,000 mJ |
| inch-pound | 8,850.7 in·lb |
| joule | 1,000 J |
| foot-pound | 737.56 ft⋅lb |
| calorie | 239.01 cal |
| calorie (International Table) | 238.85 cal IT |
| kilojoule | 1 kJ |
| BTU (thermochemical) | 0.94845 BTU th |
| British thermal unit | 0.94782 BTU |
| watt-hour | 0.27778 Wh |
| kilocalorie | 0.23901 kcal |
| megajoule | 0.001 MJ |
| horsepower-hour | 0.00037251 hp·h |
| kilowatt-hour | 0.00027778 kWh |
| therm | 0.0000094782 therm |
| gigajoule | 0.000001 GJ |
| million BTU | 9.4782e-07 MMBTU |
| megawatt-hour | 2.7778e-07 MWh |
| ton of TNT | 2.3901e-07 t TNT |
| tonne of oil equivalent | 2.3885e-08 toe |
| terajoule | 1.0000e-09 TJ |
| gigawatt-hour | 2.7778e-10 GWh |
| kiloton of TNT | 2.3901e-10 kt TNT |
| petajoule | 1.0000e-12 PJ |
| terawatt-hour | 2.7778e-13 TWh |
| megaton of TNT | 2.3901e-13 Mt TNT |
| quad | 9.4782e-16 quad |
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 |