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Energy Converter

Convert between different energy units

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

Keyboard: ↑/↓ to browse Enter to choose and Esc to close

This is the unit for the number you entered.

  • Joule (J)
  • Kilojoule (kJ)
  • Calorie (cal)
  • Kilocalorie (kcal)
  • Kilowatt-hour (kWh)
  • British Thermal Unit (BTU)

Keyboard: ↑/↓ to browse Enter to choose and Esc to close

Pick the output unit for the conversion.

Result

Enter a value and pick both units to see the converted result.

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Report a bug

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.