ENERGY CONVERSION
Joule to Watt-hour.
Convert joule (J) to watt-hour (Wh), with the math explained.
1 J = 0.0002777777778 Wh
THE MATH, MADE SIMPLE
How to convert joule to watt-hour
Multiply your joule value by 0.000277777777778 to get the equivalent in watt-hour. Both units are normalized through the joule.
Wh = J × 0.000277777777810 J = 0.00277777777778 Wh
Result rounded to 12 significant digits. Change the precision in the calculator to suit your task.QUICK REFERENCE
J to Wh conversion table
| Joule (J) | Watt-hour (Wh) |
|---|---|
| 1 J | 0.000277777777778 Wh |
| 2 J | 0.000555555555556 Wh |
| 5 J | 0.00138888888889 Wh |
| 10 J | 0.00277777777778 Wh |
| 20 J | 0.00555555555556 Wh |
| 50 J | 0.0138888888889 Wh |
| 100 J | 0.0277777777778 Wh |
| 500 J | 0.138888888889 Wh |
| 1,000 J | 0.277777777778 Wh |
About the joule
The joule (J) is a unit of energy. One joule equals 1 joule (base unit) in this calculator.
All joule conversionsAbout the watt-hour
The watt-hour (Wh) is a unit of energy. One watt-hour equals 3,600 joule (base unit) in this calculator.
All watt-hour conversionsCommon questions
What is 1 J in Wh?
One joule equals 0.000277777777778 Wh. Use the formula above for other values.
Why might another calculator show a different last digit?
Calculators may round at different stages or use different unit conventions. We keep full JavaScript numeric precision during calculation and round only for display. Choose up to 15 significant digits. Check US versus UK units and the notes for this category.
BROWSE BY UNIT