Table Of Contents
Joules to watt-hour Conversion
1 joules (joule) is equal to 0.0002777777778 watt-hour (W⋅hr).
1 joule = 0.0002777777778 W⋅hr
or
1 W⋅hr = 3600 joule
Formula
To convert a energy from joules (joule) to watt-hour (W⋅hr), divide the energy in joules by 3600
e(W⋅hr) = e(joule) / 3600
Examples:
Convert 1 joules to watt-hour:
e(W⋅hr) = 1joule / 3600 = 0.0002777777778 W⋅hr
Conversion table
| Joules (joule) | Watt-hour (W⋅hr) |
|---|---|
| 1 joule | 2.77778e-4 W⋅hr |
| 2 joule | 5.55556e-4 W⋅hr |
| 3 joule | 8.33333e-4 W⋅hr |
| 5 joule | 0.001388889 W⋅hr |
| 10 joule | 0.002777778 W⋅hr |
| 20 joule | 0.005555556 W⋅hr |
| 25 joule | 0.006944444 W⋅hr |
| 50 joule | 0.013888889 W⋅hr |
| 100 joule | 0.027777778 W⋅hr |
| 250 joule | 0.069444444 W⋅hr |
| 500 joule | 0.138888889 W⋅hr |
| 1000 joule | 0.277777778 W⋅hr |
| Watt-hour (W⋅hr) | Joules (joule) |
|---|---|
| 1 W⋅hr | 3600 joule |
| 2 W⋅hr | 7200 joule |
| 3 W⋅hr | 10800 joule |
| 5 W⋅hr | 18000 joule |
| 10 W⋅hr | 36000 joule |
| 20 W⋅hr | 72000 joule |
| 25 W⋅hr | 90000 joule |
| 50 W⋅hr | 180000 joule |
| 100 W⋅hr | 360000 joule |
| 250 W⋅hr | 900000 joule |
| 500 W⋅hr | 1800000 joule |
| 1000 W⋅hr | 3600000 joule |
Frequently asked questions
How do I convert joules to watt-hour?
Divide the value in joules by 3600 to get the result in watt-hour. For example, 5 joule ÷ 3600 = 0.001388889 W⋅hr.
How many watt-hour are in 1 joules?
1 joules (joule) is equal to 2.77778e-4 watt-hour (W⋅hr).
How do I convert watt-hour back to joules?
Use the inverse operation: multiply the value in watt-hour by 3600 to get the result in joules.
How accurate is the joules to watt-hour conversion?
The converter multiplies by the conversion factor 3600 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
- BIPM — The International System of Units (SI Brochure, 9th edition)
- NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically (NIST SP 811, 2008 edition)
- NIST Guide to the SI (SP 811), Footnotes (notes 22 and 23)
- CODATA Value: electron volt-joule relationship (NIST Fundamental Physical Constants)