Energy Converter
Convert between 8 energy units.
Conversion table — 1 unit in joule
| Unit | Joule |
|---|---|
| Joule | 1 |
| Kilojoule | 1000 |
| Calorie | 4.184 |
| Kilocalorie | 4184 |
| Watt-hour | 3600 |
| Kilowatt-hour | 3600000 |
| BTU | 1055.05585262 |
| Electronvolt | 1.602177e-19 |
Energy conversions — frequently asked
- What is 1 Joule in kilojoule?
- 1 Joule = 0.001 kilojoule.
- What is 1 Joule in calorie?
- 1 Joule = 0.239005736138 calorie.
- What is 1 Joule in kilocalorie?
- 1 Joule = 0.000239005736138 kilocalorie.
- What is 1 Joule in watt-hour?
- 1 Joule = 0.000277777777778 watt-hour.
- What is 1 Joule in kilowatt-hour?
- 1 Joule = 2.777778e-7 kilowatt-hour.
- What is 1 Joule in btu?
- 1 Joule = 0.000947817120313 btu.
About Unit Converter
A unit converter changes a measurement from one unit to another. Pick a category — length, weight, temperature, data, area, speed, and 75+ more — enter a value, and get accurate conversions instantly. It runs in your browser with no sign-up.
Frequently asked questions
- How many unit categories are supported?
- Over 75, covering everyday and technical needs — length, mass, temperature, volume, area, speed, data storage, energy, pressure, and many more.
- Are the conversions accurate?
- Yes. Conversions use standard factors and precise formulas (including non-linear ones like temperature).
- Does it work offline or on mobile?
- It runs in any modern browser on phone, tablet, or desktop, with no install.
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