Energy Converter

About Energy Conversion

This free online energy converter helps you convert between21 different units of energy. Whether you need to convert Joule to Kilojoule or any other combination, our calculator provides instant, accurate results.

Available Energy Units

Our energy converter supports the following units:

• 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)

How to Use This Converter

1. Enter the value you want to convert in the "From" field
2. Select the unit you're converting from using the dropdown
3. Select the unit you want to convert to
4. The result is calculated instantly
5. Click the copy button to copy the result to your clipboard