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Convert watt-hours to joules

Convert watt-hours (Wh) to joules (J). 1 Wh = 3,600 J, and 1 J = 0.000277778 Wh.

1 Wh = 3,600 J

Wh to Joules formula

J = Wh × 3,600

Multiply the number of watt-hours by 3,600.

Example: To convert 1 Wh to joules: 1 × 3,600 = 3,600 J.

Quick answers

What is 1 Wh in joules?
1 Wh = 3,600 J
What is 100 Wh in joules?
100 Wh = 360,000 J

Wh to Joules conversion table

Joules to Wh table
watt-hours (Wh)joules (J)
1 Wh3,600 J
10 Wh36,000 J
50 Wh180,000 J
60 Wh216,000 J
99 Wh356,400 J
100 Wh360,000 J
500 Wh1,800,000 J
1,000 Wh3,600,000 J

Frequently asked questions

How many joules are in a watt-hour?

There are 3,600 joules in a watt-hour (1 Wh = 3,600 J).

How do I convert watt-hours to joules?

Multiply the number of watt-hours by 3,600. To convert 1 Wh to joules: 1 × 3,600 = 3,600 J.

Is the Wh to Joules conversion exact?

Yes. Both units are defined exactly, so 1 watt-hour is exactly 3,600 joules. Results on this page are rounded to six significant digits; pick more decimals in the converter if you need them.

What is 1 Wh in joules?

1 Wh = 3,600 J.

How do I convert joules back to watt-hours?

Use the reverse relationship: 1 J = 0.000277778 Wh. The Joules to Wh page has a converter and a full table.

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