Watt-hour to Joule Converter
Convert watt-hours to joules with this free energy converter. The exact relationship used on this page is 1 watt-hour = 3600 joules. Type any number — the result updates instantly, works on phones and desktops, and is ready to copy into homework, a spec sheet, or a shopping list.
Formula: Joule = Watt-hour × 3600
How to convert watt-hours to joules
- Enter the value in watt-hours in the converter.
- Read the equivalent amount in joules.
- Use the swap link if you need joule to watt-hour instead.
- Check the table for common values without typing.
Worked examples
- 1 Wh = 3,600 J
- 5 Wh = 18,000 J
- 10 Wh = 36,000 J
- 25 Wh = 90,000 J
Conversion table
Common watt-hours values converted to joules.
| Wh | J |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 4 | 14,400 |
| 5 | 18,000 |
| 6 | 21,600 |
| 7 | 25,200 |
| 8 | 28,800 |
| 9 | 32,400 |
| 10 | 36,000 |
| 20 | 72,000 |
| 50 | 180,000 |
| 100 | 360,000 |
| 250 | 900,000 |
| 500 | 1,800,000 |
| 1,000 | 3,600,000 |
About this conversion
Watt-hour (Wh) and Joule (J) are both energy units. Energy converters connect food labels (kcal), electricity bills (kWh), physics (joules), and heating (BTU). Bookmark this URL when you convert watt-hours to joules often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the joule to watt-hour converter.
FAQ
How many joules are in 1 watt-hour?+
1 watt-hour equals 3600 joules.
What is the formula to convert watt-hours to joules?+
Joule = Watt-hour × 3600
How do I convert watt-hours to joules by hand?+
Multiply the watt-hour value by 3600. Example: 10 watt-hours × 3600 = 36000 joules.
Is this Wh to J converter accurate?+
Yes. Linear conversions use internationally agreed factors relative to SI. Temperature and inverse fuel units use the standard offset or reciprocal formulas, not a guessed scale factor.