Convert Watt-hours to Joules — Instantly
Convert watt-hours to joules (J) instantly using the formula joules = watt-hours × 3,600. Includes a calculator, conversion table, worked examples, and FAQs.
Watt-hours to joules converter
Quick Reference
Watt-hours to Joules Conversion Table
Common watt-hour to joule conversions at a glance, using the exact relationship 1 Wh = 3,600 J.
| Watt-hours (Wh) | Calculation | Joules (J) |
|---|---|---|
| 0.1 Wh | 0.1 × 3,600 | 360 J |
| 0.5 Wh | 0.5 × 3,600 | 1,800 J |
| 1 Wh | 1 × 3,600 | 3,600 J |
| 2 Wh | 2 × 3,600 | 7,200 J |
| 5 Wh | 5 × 3,600 | 18,000 J |
| 10 Wh | 10 × 3,600 | 36,000 J |
| 50 Wh | 50 × 3,600 | 180,000 J |
| 100 Wh | 100 × 3,600 | 360,000 J |
| 500 Wh | 500 × 3,600 | 1,800,000 J |
| 1,000 Wh | 1,000 × 3,600 | 3,600,000 J |
| 5,000 Wh | 5,000 × 3,600 | 18,000,000 J |
| 10,000 Wh | 10,000 × 3,600 | 36,000,000 J |
Step-by-Step
How to Convert Watt-hours to Joules
Converting watt-hours to joules is simple when you use the correct conversion factor.
The Formula
Watt-hours and joules are both units of energy used in electricity, battery storage, engineering, appliance specifications, and physics. This page uses the exact relationship 1 watt-hour = 3,600 joules.
To convert joules back to watt-hours, divide joules by 3,600.
How to Turn Watt-hours into Joules — Step by Step
Write down the watt-hour value
Identify the number of watt-hours you want to convert — for example, 10 Wh.
Multiply by 3,600
10 Wh × 3,600 = 36,000 joules. This gives you the equivalent energy in joules.
Label your answer
Always write the unit (J or joules) after the number so the result is clear and unambiguous.
Watt-hours vs Joules
What Is the Difference Between Watt-hours and Joules?
Watt-hours and joules are both units of energy. The joule is the standard SI unit of energy, while the watt-hour is commonly used in electricity, batteries, solar systems, power banks, appliance energy usage, and electrical engineering.
The relationship used on this page is: 1 watt-hour = 3,600 joules. To convert watt-hours to joules, multiply the number of watt-hours by 3,600.
For example, 0.5 Wh = 1,800 J, 1 Wh = 3,600 J, and 10 Wh = 36,000 J.
This conversion is useful in battery energy analysis, electronics, engineering calculations, solar storage systems, appliance energy ratings, and general energy comparisons.
Worked Examples
Sample Watt-hours to Joule Calculations
Here is how to calculate watt-hours to joules for commonly searched values.
0.5 Wh to joules
0.5 × 3,600 = 1,800 joules.
1 Wh to joules
1 × 3,600 = 3,600 joules.
2 Wh to joules
2 × 3,600 = 7,200 joules.
5 Wh to joules
5 × 3,600 = 18,000 joules.
10 Wh to joules
10 × 3,600 = 36,000 joules.
50 Wh to joules
50 × 3,600 = 180,000 joules.
100 Wh to joules
100 × 3,600 = 360,000 joules.
1,000 Wh to joules
1,000 × 3,600 = 3,600,000 joules.
FAQ
Frequently Asked Questions
Everything you need to know about converting watt-hours to joules.