Joules to Watt-hours Converter
Convert J to Wh instantly — and see every other energy unit at once.
1 J=2.7778e-4 Wh
1 J in every unit
Joulesfrom
1J
Kilojoules
0.001kJ
Megajoules
1.0000e-6MJ
Watt-hours
2.7778e-4Wh
Kilowatt-hours
2.7778e-7kWh
Calories (small)
0.239006cal
Kilocalories (kcal)
2.3901e-4kcal
BTU
9.4781e-4BTU
Electronvolts
6,241,509,074,460,763,000eV
Foot-pounds
0.737561ft·lb
Common Joules to Watt-hours conversions
| Joules (J) | Watt-hours (Wh) |
|---|---|
| 1 J | 0.00028 Wh |
| 2 J | 0.00056 Wh |
| 5 J | 0.00139 Wh |
| 10 J | 0.00278 Wh |
| 25 J | 0.00694 Wh |
| 50 J | 0.01389 Wh |
| 100 J | 0.02778 Wh |
| 250 J | 0.06944 Wh |
| 500 J | 0.13889 Wh |
| 1000 J | 0.27778 Wh |
The formula
Joules (J) — a unit of energy.
Watt-hours (Wh) — a unit of energy.
Worked examples
1 J→0.00028 Wh
Apply Joules ÷ 3600 with input = 1. Result: 0.00028 Wh.
5 J→0.00139 Wh
Apply Joules ÷ 3600 with input = 5. Result: 0.00139 Wh.
10 J→0.00278 Wh
Apply Joules ÷ 3600 with input = 10. Result: 0.00278 Wh.
FAQ
How do I convert Joules to Watt-hours?
Use the formula: Wh = Joules ÷ 3600. You can also use the converter above — type any value and the result updates instantly.
Where are Joules used?
Joules (J) — a unit of energy.
Where are Watt-hours used?
Watt-hours (Wh) — a unit of energy.
How do I convert Watt-hours back to Joules?
Use the Watt-hours to Joules converter.