Quick Reference — Energy
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About Energy Conversion
Convert joules, calories, kWh, BTU, and more. Our converter supports all major unit systems including SI (metric), Imperial, and US customary units.
Simply enter a value, select your source and target units, and get an instant accurate result. Use the swap button to reverse the conversion direction at any time.
How to Use the Energy Converter
1. Enter your value in the From field. 2. Select the source unit from the left dropdown list. 3. Select the target unit from the right dropdown list. 4. The converted result appears instantly in real-time.