Joules to watt-hours
Type a value in J to get it in Wh instantly.
That's 100× as much energy as one heartbeat, while an AA battery is 94× more. That could lift a one-tonne car 0.0102 m into the air.
Convert the other way: Wh to J
What it means
What could that energy do?
The hill climb ignores friction and assumes a 1,000 kg car. Food calories on labels are kilocalories.
The math
How to convert J to Wh
To convert joules to watt-hours, multiply by 0.000277778.
Example: 100 J × 0.000277778 = 0.0277778 Wh.
In the other direction, 1 Wh = 3,600 J.
Every unit
Your energy in every unit
Tables
J to Wh conversion table
| J | Wh |
|---|---|
| 1 J | 0.000277778 Wh |
| 2 J | 0.000555556 Wh |
| 5 J | 0.00138889 Wh |
| 10 J | 0.00277778 Wh |
| 15 J | 0.00416667 Wh |
| 20 J | 0.00555556 Wh |
| 25 J | 0.00694444 Wh |
| 50 J | 0.0138889 Wh |
| 75 J | 0.0208333 Wh |
| 100 J | 0.0277778 Wh |
| 150 J | 0.0416667 Wh |
| 200 J | 0.0555556 Wh |
| 500 J | 0.138889 Wh |
| 1,000 J | 0.277778 Wh |
Wh to J conversion table
| Wh | J |
|---|---|
| 1 Wh | 3,600 J |
| 2 Wh | 7,200 J |
| 5 Wh | 18,000 J |
| 10 Wh | 36,000 J |
| 15 Wh | 54,000 J |
| 20 Wh | 72,000 J |
| 25 Wh | 90,000 J |
| 50 Wh | 180,000 J |
| 75 Wh | 270,000 J |
| 100 Wh | 360,000 J |
| 150 Wh | 540,000 J |
| 200 Wh | 720,000 J |
| 500 Wh | 1,800,000 J |
| 1,000 Wh | 3,600,000 J |
Quick answers
Quick answers
- How many Wh is 1 J?
- 1 J is 0.000277778 Wh.
- How many Wh is 10 J?
- 10 J is 0.00277778 Wh.
- How many Wh is 100 J?
- 100 J is 0.0277778 Wh.
The units
About these units
Joules (J)
The joule is the SI unit of energy: the work done pushing with one newton over one meter. Lifting an apple a meter takes about one joule.
Watt-hours (Wh)
A watt-hour is one watt for one hour, 3,600 joules. Phone and laptop batteries are rated in watt-hours.
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