Convert kilojoules to watt-hours
1 kJ = 0.277777777778 Wh — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.277 777 777 778Wh
As a fraction: 5/18
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1 kJ = 0.277777777778 Wh
Show this value in all 39 energy & work units
- Petajoules PJ 1e-12
- Terajoules TJ 1e-9
- Gigajoules GJ 0.000 001
- Megajoules MJ 0.001
- Kilojoules kJ 1
- Joules J 1000
- Millijoules mJ 1 000 000
- Microjoules µJ 1 000 000 000
- Nanojoules nJ 1 000 000 000 000
- Watt-hours Wh 0.277 777 777 778
- Kilowatt-hours kWh 0.000 277 777 777 778
- Megawatt-hours MWh 0.000 000 277 777 777 778
- Gigawatt-hours GWh 2.77777777778e-10
- Terawatt-hours TWh 2.77777777778e-13
- Calorie (thermochemical)s cal 239.005 736 138
- Kilocalories kcal 0.239 005 736 138
- Calorie (IT)s cal (IT) 238.845 896 627
- Kilocalorie (IT)s kcal (IT) 0.238 845 896 627
- British thermal units BTU 0.947 817 120 313
- BTU (thermochemical)s BTU (th) 0.948 451 652 677
- Million BTUs MMBTU 0.000 000 947 817 120 313
- Therm (US)s thm 0.000 009 480 434 279 73
- Therm (EC)s thm (EC) 0.000 009 478 169 879 13
- Electronvolts eV 6.24150907446e+21
- Kiloelectronvolts keV 6.24150907446e+18
- Megaelectronvolts MeV 6 241 509 074 460 000
- Gigaelectronvolts GeV 6 241 509 074 460
- Teraelectronvolts TeV 6 241 509 074.46
- Ergs erg 10 000 000 000
- Foot-pounds ft·lbf 737.562 149 277
- Inch-pounds in·lbf 8850.745 791 33
- Foot-poundals ft·pdl 23 730.360 404 2
- Horsepower-hours hp·h 0.000 372 506 135 999
- Tonne of TNTs t TNT 0.000 000 239 005 736 138
- Kiloton of TNTs kt TNT 2.39005736138e-10
- Megaton of TNTs Mt TNT 2.39005736138e-13
- Hartrees Eₕ 2.2937122784e+20
- Rydbergs Ry 4.58742455679e+20
- Quads quad 9.47817120313e-16
Every row is Kilojoule (kJ) converted through the joule, in exact rational arithmetic.
How to convert kilojoules to watt-hours
Multiply the number of kilojoules by 0.277777777778 to get watt-hours.
Kilojoule to Watt-hour conversion table
| Kilojoules (kJ) | Watt-hours (Wh) |
|---|---|
| 1 kJ | 0.277 777 78 |
| 2 kJ | 0.555 555 56 |
| 3 kJ | 0.833 333 33 |
| 5 kJ | 1.388 888 9 |
| 10 kJ | 2.777 777 8 |
| 20 kJ | 5.555 555 6 |
| 25 kJ | 6.944 444 4 |
| 50 kJ | 13.888 889 |
| 100 kJ | 27.777 778 |
| 250 kJ | 69.444 444 |
| 500 kJ | 138.888 89 |
| 1000 kJ | 277.777 78 |
Watt-hour to Kilojoule conversion table
| Watt-hours (Wh) | Kilojoules (kJ) |
|---|---|
| 1 Wh | 3.6 |
| 2 Wh | 7.2 |
| 3 Wh | 10.8 |
| 5 Wh | 18 |
| 10 Wh | 36 |
| 20 Wh | 72 |
| 25 Wh | 90 |
| 50 Wh | 180 |
| 100 Wh | 360 |
| 250 Wh | 900 |
| 500 Wh | 1800 |
| 1000 Wh | 3600 |
Frequently asked
How many watt-hours are in a kilojoule?
One kilojoule equals 0.2777777778 watt-hours (kJ → Wh). That figure is exact, not rounded.
How do you convert kilojoules to watt-hours?
Multiply the number of kilojoules by 0.277777777778 to get watt-hours.
What is 1 Wh in kilojoules?
One watt-hour is 3.6 kilojoules.
What is 10 kJ in Wh?
10 kJ = 2.777 777 8 Wh.