Convert Wh to joules
Input the number of watt-hours you want to convert to joules.
How to Convert Watt-hours to Joules
The watt-hour and joule are both units of energy. By definition, 1 watt-hour equals exactly 3600 joules. This means to convert watt-hours to joules, you multiply by 3600.
Formula
Step-by-Step Example
Convert 5 Wh to joules:
We need to convert watt-hours to joules
Since 1 Wh = 3600 J, multiply by 3600
5 × 3600 = 18000
5 Wh = 18000 J
Watt-hour to Joule Conversion Table
Quick reference table for common watt-hour to joule conversions. Click any value for detailed calculation.
| Watt-hours (Wh) | Joules (J) |
|---|---|
| 0.1 Wh | 360 J |
| 0.5 Wh | 1800 J |
| 1 Wh | 3600 J |
| 2 Wh | 7200 J |
| 5 Wh | 18000 J |
| 10 Wh | 36000 J |
| 25 Wh | 90000 J |
| 50 Wh | 180000 J |
| 100 Wh | 360000 J |
About These Units
Watt-hour (Wh)
A watt-hour (Wh) is the energy of one watt sustained for one hour, equal to 3,600 joules. Watt-hours measure battery capacity (smartphone: 10-15 Wh, laptop: 50-100 Wh) and small appliance energy use. One Wh equals 3.6 kilojoules.
Joule (J)
The joule (J) is the SI unit of energy equal to one watt-second or one newton-meter. Joules measure work, heat, and electrical energy. One joule equals approximately 0.239 calories. Lifting a 100g apple one meter requires about 1 joule. Named after physicist James Prescott Joule.
Frequently Asked Questions
How do I convert watt-hours to joules?
To convert watt-hours to joules, multiply the value by 3600. For example, 10 Wh = 36000 J.
How many joules are in 1 watt-hour?
1 watt-hour equals 3600 joules.
What is the formula for watt-hours to joules?
The formula is: J = Wh × 3600.