Energy Converter
Convert energy between joules, calories, watt-hours, and BTU.
100% Private — runs in your browserNo uploads, no sign-upFree forever
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How It Works
- Enter the value
- Pick source unit
- Pick target unit
- Click Convert
Use Cases
- Physics
- Nutrition
- Electricity bills
Frequently Asked Questions
How many joules in a kcal?
1 kcal equals 4184 joules.
Does the Energy Converter work offline?
Once the page has loaded, the tool runs entirely in your browser and works without an internet connection.
Is the Energy Converter free to use?
Yes, the Energy Converter is completely free with no hidden fees, subscriptions, or usage limits.
Do I need to create an account?
No account or sign-up is required. You can start using the tool immediately.
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