kJ to Wh
Convert Kilojoule to Watt-hour
Convert Kilojoule to Watt-hour instantly with the tool above. The conversion factor is 0.27777778, meaning 1 kilojoule equals 0.27777778 watt-hours. Type any value and the result updates immediately — no ads, no page reloads, no clutter.
Type a number above. The result updates instantly — no buttons, no reloads.
1 Kilojoule = 0.27777778 watt-hours
1 Watt-hour = 3.6 kilojoules
Quick reference
Common kilojoules converted to watt-hours at a glance.
| kJ | Wh |
|---|---|
| 1 | 0.27777778 |
| 2 | 0.55555556 |
| 5 | 1.38888889 |
| 10 | 2.77777778 |
| 25 | 6.94444444 |
| 50 | 13.88888889 |
| 100 | 27.77777778 |
| 500 | 138.88888889 |
| 1,000 | 277.77777778 |
How to convert kilojoules to watt-hours
To convert a value from kilojoules to watt-hours, multiply the kilojoule value by 0.27777778 watt-hours. For example, 10 kilojoules × that factor = 2.77777778 watt-hours.
This kilojoule to watt-hour converter runs entirely in your browser, so results appear instantly with no page reload, no advertisements and no sign-up.
Frequently asked questions
How many watt-hours are in 1 kilojoule?+
1 kilojoule is equal to 0.27777778 watt-hours.
How do you convert kilojoules to watt-hours?+
To convert kilojoules to watt-hours, multiply the kilojoule value by 0.27777778. For example, 10 kilojoules × 0.27777778 = 2.77777778 watt-hours.
What is the formula to convert kilojoules to watt-hours?+
Kilojoule → Watt-hour: value × 0.27777778. Equivalently, 1 kilojoule = 0.27777778 watt-hours.
Is this Kilojoule to Watt-hour converter free to use?+
Yes. This kilojoule to watt-hour converter is completely free, works instantly in your browser, and contains no advertisements, popups or sign-up.