Kilojoule to Watt-hour Converter

Convert Kilojoule to Watt-hour instantly — live results with exact conversion factors.

From

0.27777778 Wh

1 kilojoule = 0.2777777778 watt-hours. To convert kJ to Wh, multiply by 0.2777777778.

Quick Reference Table

Kilojoule (kJ)	Watt-hour (Wh)
1	0.27777778
2	0.55555556
5	1.38888889
10	2.77777778
20	5.55555556
50	13.8888889
100	27.7777778
250	69.4444444
500	138.888889
1000	277.777778

Formula

Convert Kilojoule (kJ) to Watt-hour (Wh) using the relationship:

Wh = kJ × 0.2777777778

How to Convert

Take the value in kilojoules (kJ).
Multiply it by 0.2777777778 (the conversion factor from kJ to Wh).
The result is the equivalent value in watt-hours (Wh).
Example: 1 kJ = 0.27777778 Wh.

Reverse Conversion

Need it the other direction? Watt-hour to Kilojoule conversion.

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FAQ

▸ How many watt-hours are in 1 kilojoule?

1 Kilojoule equals 0.27777778 watt-hours. Multiply by 0.2777777778 to convert kJ to Wh.

▸ What is the formula to convert kilojoule to watt-hour?

Multiply the value in kilojoules by 0.2777777778 to get watt-hours. Formula: Wh = kJ × 0.2777777778.

▸ How do I convert kilojoules to watt-hours easily?

Enter your value in the converter at the top of this page — the watt-hours result updates live as you type. You can also multiply by 0.2777777778 directly.

Answer