Convert Wh to joules

Watt hours to joules. Enter a value to convert, or use the Wh to joules chart further down the page.

1 Wh = 3,600 J

1 watt hour equals 3,600 joules. Going the other way, 1 joule = 0.0002777777778 watt hours.

How to convert Wh to joules

To convert watt hours to joules, multiply the watt hour value by 3600. You can also divide by 0.0002777777778 to get the same answer.

J = Wh × 3600

Convert 15 Wh to joules:

15 Wh = 54,000 J

Use this Wh to joules table for quick reference without typing anything.

A watt hour is exactly 3,600 joules — the energy used by a one-watt device in one hour. Battery capacity is rated in watt hours.

The joule is the SI unit of energy: the work done by a force of one newton acting over one meter.

How many joules are in a watt hour?

1 Wh equals 3,600 joules. Going the other way, 1 joules is 0.0002777777778 Wh.

How do you convert Wh to joules?

To convert watt hours to joules, multiply the watt hour value by 3600. You can also divide by 0.0002777777778 to get the same answer.

What is 10 Wh in joules?

10 Wh equals 36,000 joules. The conversion chart on this page lists the other values people look up most often.