Convert Watt Hours to Joules

Q: How many joules are in a watt hour?

There are 3,600 joules in one watt hour.

Q: How many watt hours are in a joule?

There are 0.0002777778 watt hours in one joule.

1 watt hour = 3,600 joules. Type any value below to convert in either direction — the calculation happens in your browser.

watt hours

joules

Watt Hours to Joules formula

Multiply the number of watt hours by 3600 to get joules.

joules = watt hours × 3600

To go the other way: divide the number of joules by 3600, or multiply by 0.0002777778.

watt hours = joules ÷ 3600

Watt Hours to Joules conversion table

Watt Hours	Joules
1 Wh	3,600 J
2 Wh	7,200 J
3 Wh	10,800 J
4 Wh	14,400 J
5 Wh	18,000 J
6 Wh	21,600 J
7 Wh	25,200 J
8 Wh	28,800 J
9 Wh	32,400 J
10 Wh	36,000 J
15 Wh	54,000 J
20 Wh	72,000 J
25 Wh	90,000 J
30 Wh	108,000 J
40 Wh	144,000 J
50 Wh	180,000 J
75 Wh	270,000 J
100 Wh	360,000 J
250 Wh	900,000 J
500 Wh	1,800,000 J
1,000 Wh	3,600,000 J

Joules to Watt Hours conversion table

Joules	Watt Hours
1 J	0.0002777778 Wh
2 J	0.0005555556 Wh
3 J	0.0008333333 Wh
4 J	0.001111111 Wh
5 J	0.001388889 Wh
6 J	0.001666667 Wh
7 J	0.001944444 Wh
8 J	0.002222222 Wh
9 J	0.0025 Wh
10 J	0.002777778 Wh

About the watt hour

A watt hour is the energy of one watt sustained for one hour, equal to 3,600 joules.

About the joule

The joule is the SI unit of energy — the work done by one newton acting over one metre.

Frequently asked questions

How many joules are in a watt hour?

There are 3,600 joules in one watt hour.

How many watt hours are in a joule?

There are 0.0002777778 watt hours in one joule.

Is this conversion exact?

The ratio between the watt hour and the joule is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.

What is 10 watt hours in joules?

10 watt hours equals 36,000 joules.

Related energy conversions

All energy converters · All converters