Watt-hours to Joules Converter
Convert watt-hours (Wh) to joules (J) instantly. Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Result
- Joules
- 3,600 J
How to use the watt-hours to joules converter
- Enter the watt-hours (Wh).
- The results update as you type, or press Calculate.
- Read the joules first, then the supporting figures below it.
Formula
Joules = watt-hours × 3,600
Worked example
For example, with these inputs:
- Watt-hours (Wh): 1
the calculator returns:
- Joules: 3,600 J
Watt-hours to Joules table
| Watt-hours | Joules |
|---|---|
| 1 Wh | 3,600 J |
| 2 Wh | 7,200 J |
| 5 Wh | 18,000 J |
| 10 Wh | 36,000 J |
| 20 Wh | 72,000 J |
| 25 Wh | 90,000 J |
| 50 Wh | 180,000 J |
| 100 Wh | 360,000 J |
| 250 Wh | 900,000 J |
| 500 Wh | 1,800,000 J |
| 1,000 Wh | 3,600,000 J |
About this conversion
Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Frequently asked questions
How many joules are in one watt-hour?
1 Wh = 3,600 J.
How do I convert Wh to J?
Joules = watt-hours × 3,600.