Joule to Watt-hour Converter

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

From

0.000277777778 Wh

1 joule = 0.0002777777778 watt-hours. To convert J to Wh, multiply by 0.0002777777778.

Quick Reference Table

Joule (J)	Watt-hour (Wh)
1	0.000277777778
2	0.000555555556
5	0.00138888889
10	0.00277777778
20	0.00555555556
50	0.013888889
100	0.027777778
250	0.069444444
500	0.13888889
1000	0.27777778

Formula

Convert Joule (J) to Watt-hour (Wh) using the relationship:

Wh = J × 0.0002777777778

How to Convert

Take the value in joules (J).
Multiply it by 0.0002777777778 (the conversion factor from J to Wh).
The result is the equivalent value in watt-hours (Wh).
Example: 1 J = 0.000277777778 Wh.

Reverse Conversion

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

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FAQ

▸ How many watt-hours are in 1 joule?

1 Joule equals 0.000277777778 watt-hours. Multiply by 0.0002777777778 to convert J to Wh.

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

Multiply the value in joules by 0.0002777777778 to get watt-hours. Formula: Wh = J × 0.0002777777778.

▸ How do I convert joules 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 0.0002777777778 directly.

Answer