How many joules are in a watt-hour?
There are 3,600 joules in 1 watt-hour (Wh).
Detailed answer
1 W = 1 J/s. Over one hour (3,600 s), energy = 1 × 3,600 = 3,600 J. One kWh is 1,000 Wh, hence 3.6 MJ.
Relationship context
Battery capacity for small devices is often printed in Wh for easy comparison at a given voltage.
Quick conversion table
| Watt Hour (wh) | Joule (j) |
|---|---|
| 0.1 | 360 |
| 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 |
| Watt Hour (wh) | Joule (j) |
|---|---|
| 10 | 36,000 |
| 20 | 72,000 |
| 30 | 108,000 |
| 40 | 144,000 |
| 50 | 180,000 |
| 60 | 216,000 |
| 70 | 252,000 |
| 80 | 288,000 |
| 90 | 324,000 |
| 100 | 360,000 |
More Watt Hours converters
Dedicated pages from Watt Hour to every other hub energy unit (kilocalorie, kilowatt-hour, calorie, joule, kilojoule, watt-hour, BTU, electronvolt).
- watt-hour to toe (Watt Hour to Ton of Oil Equivalent)
- watt-hour to gigajoule (Watt Hour to Gigajoule)
- watt-hour to mmbtu (Watt Hour to Million BTU (MMBtu, IT))
- watt-hour to therm (Watt Hour to Therm)
- watt-hour to kilowatt-hour (Watt Hour to Kilowatt Hour)
- watt-hour to kilowatt-hour-thermal (Watt Hour to Kilowatt-hour (thermal))
- watt-hour to megajoule (Watt Hour to Megajoule)
- watt-hour to kilocalorie (Watt Hour to Kilocalorie)
- watt-hour to kilojoule (Watt Hour to Kilojoule)
- watt-hour to btu (Watt Hour to British Thermal Unit)
- watt-hour to calorie (Watt Hour to Calorie)
- watt-hour to foot-pound (Watt Hour to Feet-Pound)
- watt-hour to joule (Watt Hour to Joule)
- watt-hour to gigaelectronvolt (Watt Hour to Gigaelectronvolt)
- watt-hour to megaelectronvolt (Watt Hour to Megaelectronvolt)
- watt-hour to electronvolt (Watt Hour to Electronvolt)