Energy conversion
1 kilojoule (kJ) equals 0.277777777778 watt-hour (Wh). Enter any value below to convert from kJ to Wh.
Enter a value and choose units. Results update instantly.
1 kJ = 0.2777777778 Wh
| Unit | Value |
|---|---|
| Joule J | 1,000 |
| Kilojoule kJ | 1 |
| Thermochemical calorie cal | 239.0057361377 |
| Kilocalorie kcal | 0.2390057361 |
| Watt-hour Wh | 0.2777777778 |
| Kilowatt-hour kWh | 0.0002777778 |
| BTU (International Table) BTUₕᵀ | 0.9478171203 |
| Foot-pound ft·lb | 737.5621492773 |
| Electronvolt eV | 6.2415090745e21 |
Formula
Use this relationship for a direct conversion:
2 kJ = 0.5555555556 Wh.
The thermochemical calorie and International Table BTU are named explicitly to avoid ambiguous legacy definitions.
Quick reference
| Kilojoule (kJ) | Watt-hour (Wh) |
|---|---|
| 0.01 | 0.0027777778 |
| 0.1 | 0.0277777778 |
| 1 | 0.2777777778 |
| 2 | 0.5555555556 |
| 5 | 1.3888888889 |
| 10 | 2.7777777778 |
| 25 | 6.9444444444 |
| 50 | 13.8888888889 |
| 100 | 27.7777777778 |
| 1,000 | 277.7777777778 |
From unit
One thousand joules.
Symbol: kJ
To unit
The energy from one watt sustained for one hour.
Symbol: Wh
Keep converting
Source
Definitions are checked against NIST SP 811: Energy units. Calculations use full internal precision before display rounding.
View the complete energy converterQuestions
Use the formula Wh = kJ x 0.277777777778. 1 kilojoule (kJ) equals 0.277777777778 watt-hour (Wh).
Both unit definitions use exact factors. Only the displayed decimal may be rounded.
