Converters
Energy Converter
Convert joules, calories, watt-hours, BTU, and electronvolts.
Free to use — no sign-up or login.
This free Energy Converter covers Convert joules, calories, watt-hours, BTU, and electronvolts.
Enter the Energy Converter fields, then read the output. Converters calculators on this site keep the formula visible beside the form, with no account required.
Using the Energy Converter
Convert joules, calories, watt-hours, BTU, and electronvolts. Fill the labeled fields on the Energy Converter and read the result. The formula stays in How it works rather than being repeated here.
FAQ
How do I use the Energy Converter?
Enter the labeled values on the Energy Converter and read the output. Scale to the base unit, then to the target unit.
What formula does the Energy Converter use?
The Energy Converter uses the identity in How it works. In words: Scale to the base unit, then to the target unit.