Table Of Contents
Watt-hour to joules Conversion
1 watt-hour (W⋅hr) is equal to 3600 joules (joule).
1 W⋅hr = 3600 joule
or
1 joule = 0.0002777777778 W⋅hr
Formula
To convert a energy from watt-hour (W⋅hr) to joules (joule), multiply the energy in watt-hour by 3600
e(joule) = e(W⋅hr) × 3600
Examples:
Convert 1000 watt-hour to joules:
e(joule) = 1000W⋅hr × 3600 = 3600000 joule
Conversion table
| 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 |
| 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 |
Frequently asked questions
How do I convert watt-hour to joules?
Multiply the value in watt-hour by 3600 to get the result in joules. For example, 5 W⋅hr × 3600 = 18000 joule.
How many joules are in 1 watt-hour?
1 watt-hour (W⋅hr) is equal to 3600 joules (joule).
How do I convert joules back to watt-hour?
Use the inverse operation: divide the value in joules by 3600 to get the result in watt-hour.
How accurate is the watt-hour to joules 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)