Energy Converter
Convert between joules, calories, kWh and BTU.
How to use Energy Converter
- Open the Energy Converter tool and enter or paste your input.
- Adjust any options to match what you need.
- The result updates instantly — copy or download it.
Frequently asked questions
Yes. Energy Converter is completely free and you do not need to create an account.
Yes. This tool runs entirely in your browser — nothing you enter is uploaded to our servers.