Watt-hour (Wh)
The energy of one watt sustained for one hour.
Result
1 watt-hour = 3,600 joules
Watt-hour at a glance
| Unit name | Watt-hour (plural: watt-hours) |
|---|---|
| Symbol | Wh |
| Quantity measured | Energy |
| Measurement system | Metric |
| Also known as | wh, watt hour |
| Definition exact? | Yes — exact by definition |
1 watt-hour in other energy units
| Unit | 1 Wh equals |
|---|---|
| Joule | 3,600 J |
| Kilojoule | 3.6 kJ |
| Megajoule | 0.0036 MJ |
| Calorie | 860.42065 cal |
| Kilocalorie | 0.86042065 kcal |
| Kilowatt-hour | 0.001 kWh |
| Megawatt-hour | 0.000001 MWh |
| Electronvolt | 2.24694327 × 10²² eV |
| British thermal unit | 3.41214163 BTU |
| Therm | 0.000034121 thm |
| Foot-pound | 2,655.22374 ft·lb |
Frequently asked questions
- What is a watt-hour?
- The energy of one watt sustained for one hour.
- What is the symbol for the watt-hour?
- The symbol for the watt-hour is Wh. It measures energy.
- How many joules are in a watt-hour?
- 1 watt-hour = 3,600 joules.
- How many kilojoules are in a watt-hour?
- 1 watt-hour = 3.6 kilojoules.
- How many kilocalories are in a watt-hour?
- 1 watt-hour = 0.86042065 kilocalories.