Energy Converter
Convert between different energy units including joules, calories, BTUs, watt-hours, and more.
Popular Energy Conversions
Quick access to the most common energy conversions
Joule to Kilojoule
J to kJ
Kilojoule to Joule
kJ to J
Joule to Kilowatt-hour
J to kW⋅h
Kilowatt-hour to Joule
kW⋅h to J
Kilojoule to Watt-hour
kJ to W⋅h
Watt-hour to Kilojoule
W⋅h to kJ
Joule to Calorie (nutritional)
J to cal
Calorie (nutritional) to Joule
cal to J
Kilojoule to Horsepower (metric) hour
kJ to hp⋅h
Related Conversions
Explore more Energy conversion options
Kilojoule
to Joule
Kilowatt-hour
to Joule
Watt-hour
to Joule
Calorie (nutritional)
to Joule
Horsepower (metric) hour
to Joule
Btu (IT)
to Joule
Btu (th)
to Joule
Gigajoule
to Joule
Megajoule
to Joule
Millijoule
to Joule
Microjoule
to Joule
Nanojoule
to Joule
Attojoule
to Joule
Megaelectron-volt
to Joule
Kiloelectron-volt
to Joule
Electron-volt
to Joule
Erg
to Joule
Gigawatt-hour
to Joule
Megawatt-hour
to Joule
Kilowatt-second
to Joule
Watt-second
to Joule
Newton meter
to Joule
Horsepower hour
to Joule
Kilocalorie (IT)
to Joule
Kilocalorie (th)
to Joule
Calorie (IT)
to Joule
Calorie (th)
to Joule
Mega Btu (IT)
to Joule
Ton-hour (refrigeration)
to Joule
Fuel oil equivalent @kiloliter
to Joule
Fuel oil equivalent @barrel (US)
to Joule
Gigaton
to Joule
Megaton
to Joule
Kiloton
to Joule
Ton (explosives)
to Joule
Dyne centimeter
to Joule
Gram-force meter
to Joule
Gram-force centimeter
to Joule
Kilogram-force centimeter
to Joule
Kilogram-force meter
to Joule
Kilopond meter
to Joule
Pound-force foot
to Joule
Pound-force inch
to Joule
Ounce-force inch
to Joule
Foot-pound
to Joule
Inch-pound
to Joule
Inch-ounce
to Joule
Poundal foot
to Joule
Therm
to Joule
Therm (EC)
to Joule
Therm (US)
to Joule
Hartree energy
to Joule
Rydberg constant
to Joule