Energy Converter
Convert between different units of energy including joules, kilowatt-hours, calories, BTUs, electron-volts and more. Simply enter your value, select the units, and see the results instantly.
Conversion Result
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Common Energy Conversions
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About the Energy Converter
Our energy converter allows you to quickly convert between different units of energy including joules, kilowatt-hours, calories, BTUs, electron-volts and more. This tool is essential for physicists, engineers, chemists, nutritionists, and anyone working with energy measurements in different systems.
How to Use the Converter
- Enter the value you want to convert
- Select the unit you're converting from
- Select the unit you're converting to
- Click "Convert" to see the result
- View common conversions for your input value
Common Energy Conversion Formulas
The converter uses standard energy conversion formulas:
Joules to Other Units:
1 joule = 0.000277778 watt-hours
1 joule = 0.239006 calories (thermochemical)
1 joule = 0.000947817 BTUs (IT)
1 joule = 6.24151 × 10¹⁸ electron-volts
BTUs to Other Units:
1 BTU (IT) = 1055.06 joules
1 BTU (IT) = 0.293071 watt-hours
1 BTU (IT) = 252.164 calories (IT)
Electron-volts to Other Units:
1 electron-volt = 1.60218 × 10⁻¹⁹ joules
1 megaelectron-volt = 1.60218 × 10⁻¹³ joules
Calories to Other Units:
1 calorie (IT) = 4.1868 joules
1 calorie (th) = 4.184 joules
1 kilocalorie (IT) = 4186.8 joules
Energy Measurement Systems
The converter supports conversions between:
- SI units (joules, kilojoules, etc.)
- Imperial units (BTUs, foot-pounds, etc.)
- Electrical units (watt-hours, kilowatt-hours, etc.)
- Thermal units (calories, therms, etc.)
- Atomic units (electron-volts, Hartree energy, etc.)
- Mechanical units (erg, dyne-centimeter, etc.)