Converter group

Common Converters

Energy Converter

Value

From

Result

... = ...

Result

...

Value

FromTo

Find the units to convert

From Unit:

To Unit:

Energy Converter

Convert between joules, kilojoules, calories, kWh, and BTU.

About this converter

Energy units show up in electrical usage, physics, heating systems, and nutrition. This converter keeps the most common references connected with one formula layer.

The base unit for this converter is joule, which lets us map each unit into one consistent formula layer before converting to the target unit.

Quick examples

120 J to kJ0.12 kJ

120 J to MJ0.00012 MJ

120 kJ to J120,000 J

120 kJ to MJ0.12 MJ

120 MJ to J120,000,000 J

120 MJ to kJ120,000 kJ

120 cal to J502.08 J

120 cal to kJ0.50208 kJ

Available units

Joule

The SI unit of energy.

J to kJ J to MJ J to cal

Also written as joules.

Kilojoule

A metric multiple of the joule.

kJ to J kJ to MJ kJ to cal

Also written as kilojoules.

Megajoule

A metric multiple used for large practical energy values.

MJ to J MJ to kJ MJ to cal

Also written as megajoules.

Calorie (thermochemical)

cal

A small unit of heat energy.

cal to J cal to kJ cal to MJ

Also written as calorie, calories.

Calorie (nutritional)

Cal

The food Calorie used on nutrition labels.

Cal to J Cal to kJ Cal to MJ

Also written as food calorie, food calories, nutrition calorie, nutrition calories.

Kilocalorie (IT)

kcal IT

A kilocalorie based on the International Table calorie.

kcal IT to J kcal IT to kJ kcal IT to MJ

Also written as kcal, kilocalorie, kilocalories.

Watt-hour

An electrical energy unit for small consumption or storage values.

Wh to J Wh to kJ Wh to MJ

Also written as watt hour, watt hours, watt-hours.

Kilowatt-hour

kWh

A commercial energy unit for electricity.

kWh to J kWh to kJ kWh to MJ

Also written as kilowatt hour, kilowatt hours, kilowatt-hours.

British thermal unit (IT)

BTU

A customary heat-energy unit.

BTU to J BTU to kJ BTU to MJ

Also written as btu, btus, British thermal units.

Newton meter

N m

A force-distance unit equivalent to one joule of work.

N m to J N m to kJ N m to MJ

Also written as Nm, newton-meter, newton meters, newton-metres.

Foot-pound

ft lbf

A customary force-distance energy unit.

ft lbf to J ft lbf to kJ ft lbf to MJ

Also written as ft-lb, ft lb, foot pound, foot pounds.

Horsepower (metric) hour

metric hp h

Horsepower (metric) hour is an energy unit tied to power, fuel, or utility energy use.

metric hp h to J metric hp h to kJ metric hp h to MJ

Btu (th)

Btu th

Btu (th) is a heat-energy unit used in thermal calculations or nutrition-related contexts.

Btu th to J Btu th to kJ Btu th to MJ

Gigajoule

Gigajoule is a metric energy unit based on decimal scaling of the joule.

GJ to J GJ to kJ GJ to MJ

Millijoule

Millijoule is a metric energy unit based on decimal scaling of the joule.

mJ to J mJ to kJ mJ to MJ

Microjoule

Microjoule is a metric energy unit based on decimal scaling of the joule.

uJ to J uJ to kJ uJ to MJ

Nanojoule

Nanojoule is a metric energy unit based on decimal scaling of the joule.

nJ to J nJ to kJ nJ to MJ

Attojoule

Attojoule is a metric energy unit based on decimal scaling of the joule.

aJ to J aJ to kJ aJ to MJ

Megaelectron-volt

MeV

Megaelectron-volt is a microscopic energy unit used in atomic or quantum-scale calculations.

MeV to J MeV to kJ MeV to MJ

Kiloelectron-volt

keV

Kiloelectron-volt is a microscopic energy unit used in atomic or quantum-scale calculations.

keV to J keV to kJ keV to MJ

Electron-volt

Electron-volt is a microscopic energy unit used in atomic or quantum-scale calculations.

eV to J eV to kJ eV to MJ

Erg

erg

Erg is a specialist energy unit for technical conversion scenarios.

erg to J erg to kJ erg to MJ

Gigawatt-hour

GWh

Gigawatt-hour is an energy unit tied to power, fuel, or utility energy use.

GWh to J GWh to kJ GWh to MJ

Megawatt-hour

MWh

Megawatt-hour is an energy unit tied to power, fuel, or utility energy use.

MWh to J MWh to kJ MWh to MJ

Kilowatt-second

kWs

Kilowatt-second is an energy unit tied to power, fuel, or utility energy use.

kWs to J kWs to kJ kWs to MJ

Watt-second

Watt-second is an energy unit tied to power, fuel, or utility energy use.

Ws to J Ws to kJ Ws to MJ

Horsepower hour

hp h

Horsepower hour is an energy unit tied to power, fuel, or utility energy use.

hp h to J hp h to kJ hp h to MJ

Kilocalorie (th)

kcal th

Kilocalorie (th) is a heat-energy unit used in thermal calculations or nutrition-related contexts.

kcal th to J kcal th to kJ kcal th to MJ

Calorie (IT)

cal IT

Calorie (IT) is a heat-energy unit used in thermal calculations or nutrition-related contexts.

cal IT to J cal IT to kJ cal IT to MJ

Calorie (th)

cal th

Calorie (th) is a heat-energy unit used in thermal calculations or nutrition-related contexts.

cal th to J cal th to kJ cal th to MJ

Mega Btu (IT)

MBtu IT

Mega Btu (IT) is a heat-energy unit used in thermal calculations or nutrition-related contexts.

MBtu IT to J MBtu IT to kJ MBtu IT to MJ

Ton-hour (refrigeration)

ton h

Ton-hour (refrigeration) is a heat-energy unit used in thermal calculations or nutrition-related contexts.

ton h to J ton h to kJ ton h to MJ

Fuel oil equivalent at kiloliter

foe kL

Fuel oil equivalent at kiloliter is an energy unit tied to power, fuel, or utility energy use.

foe kL to J foe kL to kJ foe kL to MJ

Fuel oil equivalent at barrel US

foe bbl US

Fuel oil equivalent at barrel US is an energy unit tied to power, fuel, or utility energy use.

foe bbl US to J foe bbl US to kJ foe bbl US to MJ

Gigaton

Gton

Gigaton is an explosive-yield energy equivalent.

Gton to J Gton to kJ Gton to MJ

Megaton

Mton

Megaton is an explosive-yield energy equivalent.

Mton to J Mton to kJ Mton to MJ

Kiloton

kton

Kiloton is an explosive-yield energy equivalent.

kton to J kton to kJ kton to MJ

Ton (explosives)

ton explosive

Ton (explosives) is an explosive-yield energy equivalent.

ton explosive to J ton explosive to kJ ton explosive to MJ

Dyne centimeter

dyn cm

Dyne centimeter expresses work as force applied over distance.

dyn cm to J dyn cm to kJ dyn cm to MJ

Gram-force meter

gf m

Gram-force meter expresses work as force applied over distance.

gf m to J gf m to kJ gf m to MJ

Gram-force centimeter

gf cm

Gram-force centimeter expresses work as force applied over distance.

gf cm to J gf cm to kJ gf cm to MJ

Kilogram-force centimeter

kgf cm

Kilogram-force centimeter expresses work as force applied over distance.

kgf cm to J kgf cm to kJ kgf cm to MJ

Kilogram-force meter

kgf m

Kilogram-force meter expresses work as force applied over distance.

kgf m to J kgf m to kJ kgf m to MJ

Kilopond meter

kp m

Kilopond meter expresses work as force applied over distance.

kp m to J kp m to kJ kp m to MJ

Pound-force foot

lbf ft

Pound-force foot expresses work as force applied over distance.

lbf ft to J lbf ft to kJ lbf ft to MJ

Pound-force inch

lbf in

Pound-force inch expresses work as force applied over distance.

lbf in to J lbf in to kJ lbf in to MJ

Ounce-force inch

ozf in

Ounce-force inch expresses work as force applied over distance.

ozf in to J ozf in to kJ ozf in to MJ

Inch-pound

in lbf

Inch-pound expresses work as force applied over distance.

in lbf to J in lbf to kJ in lbf to MJ

Inch-ounce

in ozf

Inch-ounce expresses work as force applied over distance.

in ozf to J in ozf to kJ in ozf to MJ

Poundal foot

pdl ft

Poundal foot expresses work as force applied over distance.

pdl ft to J pdl ft to kJ pdl ft to MJ

Therm

therm

Therm is an energy unit tied to power, fuel, or utility energy use.

therm to J therm to kJ therm to MJ

Therm (EC)

therm EC

Therm (EC) is an energy unit tied to power, fuel, or utility energy use.

therm EC to J therm EC to kJ therm EC to MJ

Therm (US)

therm US

Therm (US) is an energy unit tied to power, fuel, or utility energy use.

therm US to J therm US to kJ therm US to MJ

Hartree energy

Hartree energy is a microscopic energy unit used in atomic or quantum-scale calculations.

Eh to J Eh to kJ Eh to MJ

Rydberg constant

Rydberg constant is a microscopic energy unit used in atomic or quantum-scale calculations.

Ry to J Ry to kJ Ry to MJ

Main pair pages

More routes in this section

Joule to Kilojoule Joule to Megajoule Joule to Calorie (thermochemical)Joule to Calorie (nutritional)Kilojoule to Joule Kilojoule to Megajoule Kilojoule to Calorie (thermochemical)Kilojoule to Calorie (nutritional)Megajoule to Joule Megajoule to Kilojoule Megajoule to Calorie (thermochemical)Megajoule to Calorie (nutritional)

Common Converters