Convert watt hour (Wh) to joule (J).
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Joule to Watt Hour Converter (J to Wh)
Convert joule (J) to watt hour (Wh).Unit Converter · Energy
Quick answer
1 joule (J) is approximately equal to 0.00027778 watt hours (Wh). 1 watt hour (Wh) is equal to 3,600 joules (J).
To convert J to Wh, multiply the value in joules by 0.0002777778 (or divide by 3,600). For example, 10 J = 0.00277778 Wh, and 100 J = 0.02777778 Wh.
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Quick reference — joule to watt hour
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How to convert joules to watt hours
How many watt hours are in a joule? 1 joule is about 0.00027778 watt hours. This free J to Wh converter and joule to watt hour calculator gives the answer instantly for any value.
To convert joule (J) to watt hour (Wh), multiply the value in joules by 0.0002777778, or divide it by 3,600.
Wh = J × 0.0002777778
- 1
Take the value in joules
For example, 25 J.
- 2
Multiply by 0.0002777778
25 × 0.0002777778.
- 3
Read the answer in watt hours
25 J = 0.00694444 Wh.
Joule to Watt Hour conversion table
Common values from 1 to 1,000 joules converted to watt hours.
| Joule (J) | Watt Hour (Wh) |
|---|---|
| 1 J | 0.00027778 Wh |
| 2 J | 0.00055556 Wh |
| 3 J | 0.00083333 Wh |
| 4 J | 0.00111111 Wh |
| 5 J | 0.00138889 Wh |
| 6 J | 0.00166667 Wh |
| 7 J | 0.00194444 Wh |
| 8 J | 0.00222222 Wh |
| 9 J | 0.0025 Wh |
| 10 J | 0.00277778 Wh |
| 15 J | 0.00416667 Wh |
| 20 J | 0.00555556 Wh |
| 25 J | 0.00694444 Wh |
| Joule (J) | Watt Hour (Wh) |
|---|---|
| 30 J | 0.00833333 Wh |
| 40 J | 0.01111111 Wh |
| 50 J | 0.01388889 Wh |
| 60 J | 0.01666667 Wh |
| 70 J | 0.01944444 Wh |
| 75 J | 0.02083333 Wh |
| 80 J | 0.02222222 Wh |
| 90 J | 0.025 Wh |
| 100 J | 0.02777778 Wh |
| 250 J | 0.06944444 Wh |
| 500 J | 0.13888889 Wh |
| 1,000 J | 0.27777778 Wh |
About joules and watt hours
Joule (J)
The joule (J) is the SI unit of energy: the work done by a force of one newton over one meter. One watt is one joule per second.
Watt Hour (Wh)
A watt-hour (Wh) is the energy of one watt used for one hour, equal to 3,600 joules. Battery capacities are often given in Wh.
J to Wh: common questions
- How many watt hours are in 1 joule?
- 1 joule (J) is approximately equal to 0.00027778 watt hours (Wh). In short: 1 J ≈ 0.00027778 Wh.
- How do I convert joules to watt hours?
- To convert J to Wh, multiply the value in joules by 0.0002777778 (or divide by 3,600). For example, 5 J = 0.00138889 Wh.
- How do I convert watt hours to joules?
- To convert Wh to J, multiply the value in watt hours by 3,600. Or open the Watt Hour to Joule converter, which does it for you.
- What is 10 J in Wh, and what is 100 J?
- 10 J = 0.00277778 Wh, and 100 J = 0.02777778 Wh. The table above lists more values from 1 to 1,000.
- Is this J to Wh converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
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