Convert joules (J), calories (cal), kilowatt-hours (kWh), BTU, and other energy units. Energy is the capacity to do work; the joule (J) is the SI unit (1 J = 1 N·m). Nutritional calories and electrical kWh use different reference definitions tied to joules.
This energy converter transforms values from Joules (J) to Watt Hours (Wh). Results update instantly using the exact conversion factor.
The joule (J) is the SI unit of energy (1 J = 1 N·m).
The Watt Hours (Wh) is a unit of energy in the Energy category.
1 J ÷ 3600 = 0.000278 Wh
Wh = J ÷ 3600
To convert J to Wh, divide the value in J by 3600 (since 1 J = 0.000278 Wh). Equivalently, multiply by 0.000278. Example: 1 J = 1 J × 0.000278 = 0.000278 Wh.
10 J = 0.002778 Wh ÷ 3600 = 10 J
Common values from J to Wh.
| J | Wh |
|---|---|
| 1 | 0.0003 |
| 2 | 0.0006 |
| 3 | 0.0008 |
| 4 | 0.0011 |
| 5 | 0.0014 |
| 6 | 0.0017 |
| 7 | 0.0019 |
| 8 | 0.0022 |
| 9 | 0.0025 |
| 10 | 0.0028 |
| 11 | 0.0031 |
| 12 | 0.0033 |
| 13 | 0.0036 |
| 14 | 0.0039 |
| 15 | 0.0042 |
| 16 | 0.0044 |
| 17 | 0.0047 |
| 18 | 0.005 |
| 19 | 0.0053 |
| 20 | 0.0056 |