Convert between different energy units easily
Base unit: Joule
Available units: 9 units
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Browse all toolsOur energy converter supports 9 different energy units including Joule, Kilojoule, Calorie, Kilocalorie, Watt-hour, Kilowatt-hour, BTU (British Thermal Unit), Erg, and Electronvolt. This covers all common energy measurements from particle physics to household electricity.
Conversions are calculated using precise scientific constants with up to 6 decimal places of precision. The tool uses standard conversion factors: 1 calorie = 4.184 joules (thermochemical calorie), 1 BTU = 1055.06 joules, and 1 electronvolt = 1.60218e-19 joules. It's suitable for physics, chemistry, engineering, and nutrition calculations.
Yes! This is a 100% free tool with no registration required, no usage limits, and no hidden fees. We believe in providing accessible tools for everyone.
Absolutely! The converter is fully responsive and works perfectly on smartphones, tablets, and desktop computers. The interface adapts to your screen size for optimal usability.
Simply click the "Copy Result" button after performing a conversion. The full conversion equation (e.g., "1 Joule = 0.239006 Calories") will be copied to your clipboard. You'll see a confirmation message when it's copied successfully.
No, all conversions happen locally in your browser. We don't store your input values, conversion history, or any personal data. Your privacy is important to us.