Energy Converter.
Convert joules, calories, watt-hours, BTU, electronvolts and related energy units. Uses explicit units, formulas and rounding locally. Values stay in this browser. Convert joules, calories, watt-hours, BTU, electronvolts and related energy units. Uses explicit units, formulas and rounding locally.
- ✓Runs in your browser
- ✓No account required
- ✓Verified output
Use Energy Converter
Private in this browser. Values, results and optional history stay in this browser.
Verified result
Download resultHow it works
- 01
Enter a decimal, fraction or batch of values.
- 02
Choose explicit source and target units and significant digits.
- 03
Copy or download only after an independent recalculation.
Frequently asked questions
Is the result calculated online?
No. The worker and independent verifier run locally.
Does Energy Converter upload my data?
Energy Converter runs locally in your browser. Values, results and optional history stay in this browser.
What output does Energy Converter create?
Energy Converter creates Json output after the result passes its local verification checks.