Joule to Watt-hour

1 J = 0.000278 Wh

One joule equals 0.000278 watt-hours, and one watt-hour equals 3,600 joules.

Joule to Watt-hour formula

Wh = J × 0.00027777778

To convert joules to watt-hours, multiply the value by 0.00027777778. One joule equals 0.000278 watt-hours.

Step-by-step examples

Convert 1 joules to watt-hours

  1. 1Start with the value in joules: 1 J.
  2. 2Multiply by the conversion factor 0.00027777778.
  3. 31 × 0.00027777778 = 0.000278 Wh.

Result: 1 J = 0.000278 Wh

Convert 10 joules to watt-hours

  1. 1Start with the value in joules: 10 J.
  2. 2Multiply by the conversion factor 0.00027777778.
  3. 310 × 0.00027777778 = 0.002778 Wh.

Result: 10 J = 0.002778 Wh

Convert 100 joules to watt-hours

  1. 1Start with the value in joules: 100 J.
  2. 2Multiply by the conversion factor 0.00027777778.
  3. 3100 × 0.00027777778 = 0.027778 Wh.

Result: 100 J = 0.027778 Wh

Joule to Watt-hour conversion table

Joule (J)Watt-hour (Wh)
0.010.000003
0.10.000028
0.50.000139
10.000278
20.000556
30.000833
40.001111
50.001389
100.002778
200.005556
250.006944
500.013889
1000.027778
2500.069444
5000.138889
10000.277778

Joule to Watt-hour chart

00.0006940.001390.002080.002780 J10 J

J (horizontal) vs Wh (vertical)

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Related converters

Reverse: Watt-hour to Joule

Frequently asked questions

How many watt-hours are in a joule?

There are 0.000278 watt-hours in one joule (1 J = 0.000278 Wh).

How do you convert joules to watt-hours?

To convert joules to watt-hours, multiply the value by 0.00027777778. One joule equals 0.000278 watt-hours.

What is 10 joules in watt-hours?

10 joules equals 0.002778 watt-hours.

How many joules are in a watt-hour?

One watt-hour equals 3,600 joules (1 Wh = 3,600 J).