Energy Converter
Convert between different units of energy Convert between 21 different units instantly with our free online tool.
Joule
J
Kilojoule
kJ
Megajoule
MJ
Gigajoule
GJ
Calorie
cal
Kilocalorie
kcal
Watt Hour
Wh
Kilowatt Hour
kWh
Megawatt Hour
MWh
Electronvolt
eV
Kiloelectronvolt
keV
Megaelectronvolt
MeV
British Thermal Unit
BTU
Therm
thm
Foot-pound
ft·lbf
Erg
erg
Hartree
Eh
Rydberg
Ry
Ton of TNT
tTNT
Kilogram of TNT
kgTNT
Quad
quad
Available Energy Units
21 units supported for instant conversion
About Energy Conversion
Our free online energy converter is designed to help you quickly and accurately convert between 21 different units of energy. Whether you're a student, professional, or simply need to make everyday conversions, our tool provides instant, precise results with real-time calculations.
Convert between different units of energy This converter supports both metric and imperial units, making it ideal for international use. All conversions are calculated using internationally recognized standards and formulas.
Why Use Our Energy Converter?
Instant Results
Get real-time conversions as you type. No need to click buttons or wait for calculations.
High Precision
Calculations use precise conversion factors based on international measurement standards.
21+ Units
Convert between 21 different energy units from around the world.
AI Integration
MCP server support allows AI assistants to perform conversions programmatically.
Common Energy Conversions
How to Use This Energy Converter
Enter Value
Type the number you want to convert
Select From Unit
Choose your starting unit
Select To Unit
Pick your target unit
View Result
See instant conversion
Copy Result
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Frequently Asked Questions
How accurate is this energy converter?
Our converter uses precise conversion factors based on international standards. Results are calculated to high precision and suitable for professional use, scientific calculations, and everyday conversions.
Is this energy converter free to use?
Yes, Convert2 is completely free to use. There are no hidden fees, no registration required, and no limits on the number of conversions you can perform.
Can I use this converter on mobile devices?
Absolutely! Our converter is fully responsive and works perfectly on smartphones, tablets, and desktop computers. The interface automatically adapts to your screen size.
How do I integrate this converter with AI assistants?
Convert2 provides an MCP (Model Context Protocol) server that allows AI assistants like Claude and ChatGPT to perform conversions programmatically. Check our API documentation for integration details.