Convert KiloCalorie to Megajoule

Please provide values below to convert KiloCalorie [kcal] to Megajoule [MJ]

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Unit Information

Joule (J)

Definition: The SI unit of energy, work, or heat.

History: Named after English physicist James Prescott Joule.

Current Use: Standard unit for energy in scientific applications.

Kilojoule (kJ)

Definition: A unit of energy equal to 1000 joules.

History: Commonly used for food energy content.

Current Use: Used for nutritional information and larger energy measurements.

Megajoule (MJ)

Definition: A unit of energy equal to one million joules.

History: Used for large energy measurements.

Current Use: Used for vehicle fuel efficiency and large energy systems.

Gigajoule (GJ)

Definition: A unit of energy equal to one billion joules.

History: Used for very large energy measurements.

Current Use: Used for industrial energy consumption and power plants.

Calorie (cal)

Definition: A unit of energy, originally defined as the energy needed to raise 1g of water by 1°C.

History: Defined by French chemist Nicolas Clément.

Current Use: Used in nutrition and food science.

KiloCalorie (kcal)

Definition: A unit of energy equal to 1,000 gram calories, often used to express the energy content of food.

History: Also known as the "large calorie" or "food calorie," it was historically used to measure the energy content of food before the widespread adoption of the joule.

Current Use: The most common unit for expressing the energy value of food and is what people typically refer to when they say "calorie" in a dietary context.

Electron Volt (eV)

Definition: A unit of energy equal to the kinetic energy gained by an electron accelerated through 1 volt.

History: Fundamental unit in atomic and particle physics.

Current Use: Used in atomic, nuclear, and particle physics.

Therm (thm)

Definition: A unit of energy equal to 100,000 BTU.

History: Used in natural gas industry.

Current Use: Standard unit for natural gas billing.

Foot-pound (ft·lb)

Definition: A unit of energy equal to the work done by one pound-force over one foot.

History: Traditional imperial unit.

Current Use: Used in the US for mechanical work and energy.

BTU per hour (BTU/h)

Definition: A unit of power equal to 0.293071 watts, used for measuring heat transfer rates.

History: Derived from the British thermal unit (Btu) and the hour, commonly used in heating and cooling systems.

Current Use: Used in the HVAC industry to express heating and cooling capacities.

British Thermal Unit (BTU)

Definition: A unit of energy equal to about 1055 joules.

History: Traditional British unit for heat energy.

Current Use: Used in heating, ventilation, and air conditioning.

Calorie (15°C) (cal₁₅)

Definition: The amount of heat to raise 1g of water from 14.5°C to 15.5°C.

History: Used in thermochemistry.

Current Use: Rare, but found in older scientific literature.

Calorie (International Table) (cal_IT)

Definition: Defined as exactly 4.1868 joules.

History: Used in international tables for energy conversion.

Current Use: Rare, but found in older scientific literature.

Calorie (Nutritional) (Cal)

Definition: The dietary calorie, equal to 1 kilocalorie.

History: Used in food energy labeling.

Current Use: Standard for food energy in many countries.

Calorie (Thermochemical) (cal_th)

Definition: Defined as exactly 4.184 joules.

History: Used in thermochemistry.

Current Use: Standard in thermochemical calculations.

Erg (erg)

Definition: A unit of energy in the CGS system, equal to 10^-7 joules.

History: From Greek "ergon" meaning work.

Current Use: Used in physics and astronomy for small energies.

Gram Calorie (cal)

Definition: The amount of heat needed to raise 1g of water by 1°C.

History: Used in chemistry and nutrition.

Current Use: Still used in some scientific contexts.

All Unit Conversions

Joule to KilojouleJoule to MegajouleJoule to GigajouleJoule to CalorieJoule to KiloCalorieJoule to Electron VoltJoule to ThermJoule to Foot-poundJoule to BTU per hourJoule to British Thermal UnitJoule to Calorie (15°C)Joule to Calorie (International Table)Joule to Calorie (Nutritional)Joule to Calorie (Thermochemical)Joule to ErgJoule to Gram CalorieKilojoule to JouleKilojoule to MegajouleKilojoule to GigajouleKilojoule to CalorieKilojoule to KiloCalorieKilojoule to Electron VoltKilojoule to ThermKilojoule to Foot-poundKilojoule to BTU per hourKilojoule to British Thermal UnitKilojoule to Calorie (15°C)Kilojoule to Calorie (International Table)Kilojoule to Calorie (Nutritional)Kilojoule to Calorie (Thermochemical)Kilojoule to ErgKilojoule to Gram CalorieMegajoule to JouleMegajoule to KilojouleMegajoule to GigajouleMegajoule to CalorieMegajoule to KiloCalorieMegajoule to Electron VoltMegajoule to ThermMegajoule to Foot-poundMegajoule to BTU per hourMegajoule to British Thermal UnitMegajoule to Calorie (15°C)Megajoule to Calorie (International Table)Megajoule to Calorie (Nutritional)Megajoule to Calorie (Thermochemical)Megajoule to ErgMegajoule to Gram CalorieGigajoule to JouleGigajoule to KilojouleGigajoule to MegajouleGigajoule to CalorieGigajoule to KiloCalorieGigajoule to Electron VoltGigajoule to ThermGigajoule to Foot-poundGigajoule to BTU per hourGigajoule to British Thermal UnitGigajoule to Calorie (15°C)Gigajoule to Calorie (International Table)Gigajoule to Calorie (Nutritional)Gigajoule to Calorie (Thermochemical)Gigajoule to ErgGigajoule to Gram CalorieCalorie to JouleCalorie to KilojouleCalorie to MegajouleCalorie to GigajouleCalorie to KiloCalorieCalorie to Electron VoltCalorie to ThermCalorie to Foot-poundCalorie to BTU per hourCalorie to British Thermal UnitCalorie to Calorie (15°C)Calorie to Calorie (International Table)Calorie to Calorie (Nutritional)Calorie to Calorie (Thermochemical)Calorie to ErgCalorie to Gram CalorieKiloCalorie to JouleKiloCalorie to KilojouleKiloCalorie to MegajouleKiloCalorie to GigajouleKiloCalorie to CalorieKiloCalorie to Electron VoltKiloCalorie to ThermKiloCalorie to Foot-poundKiloCalorie to BTU per hourKiloCalorie to British Thermal UnitKiloCalorie to Calorie (15°C)KiloCalorie to Calorie (International Table)KiloCalorie to Calorie (Nutritional)KiloCalorie to Calorie (Thermochemical)KiloCalorie to ErgKiloCalorie to Gram CalorieElectron Volt to JouleElectron Volt to KilojouleElectron Volt to MegajouleElectron Volt to GigajouleElectron Volt to CalorieElectron Volt to KiloCalorieElectron Volt to ThermElectron Volt to Foot-poundElectron Volt to BTU per hourElectron Volt to British Thermal UnitElectron Volt to Calorie (15°C)Electron Volt to Calorie (International Table)Electron Volt to Calorie (Nutritional)Electron Volt to Calorie (Thermochemical)Electron Volt to ErgElectron Volt to Gram CalorieTherm to JouleTherm to KilojouleTherm to MegajouleTherm to GigajouleTherm to CalorieTherm to KiloCalorieTherm to Electron VoltTherm to Foot-poundTherm to BTU per hourTherm to British Thermal UnitTherm to Calorie (15°C)Therm to Calorie (International Table)Therm to Calorie (Nutritional)Therm to Calorie (Thermochemical)Therm to ErgTherm to Gram CalorieFoot-pound to JouleFoot-pound to KilojouleFoot-pound to MegajouleFoot-pound to GigajouleFoot-pound to CalorieFoot-pound to KiloCalorieFoot-pound to Electron VoltFoot-pound to ThermFoot-pound to BTU per hourFoot-pound to British Thermal UnitFoot-pound to Calorie (15°C)Foot-pound to Calorie (International Table)Foot-pound to Calorie (Nutritional)Foot-pound to Calorie (Thermochemical)Foot-pound to ErgFoot-pound to Gram CalorieBTU per hour to JouleBTU per hour to KilojouleBTU per hour to MegajouleBTU per hour to GigajouleBTU per hour to CalorieBTU per hour to KiloCalorieBTU per hour to Electron VoltBTU per hour to ThermBTU per hour to Foot-poundBTU per hour to British Thermal UnitBTU per hour to Calorie (15°C)BTU per hour to Calorie (International Table)BTU per hour to Calorie (Nutritional)BTU per hour to Calorie (Thermochemical)BTU per hour to ErgBTU per hour to Gram CalorieBritish Thermal Unit to JouleBritish Thermal Unit to KilojouleBritish Thermal Unit to MegajouleBritish Thermal Unit to GigajouleBritish Thermal Unit to CalorieBritish Thermal Unit to KiloCalorieBritish Thermal Unit to Electron VoltBritish Thermal Unit to ThermBritish Thermal Unit to Foot-poundBritish Thermal Unit to BTU per hourBritish Thermal Unit to Calorie (15°C)British Thermal Unit to Calorie (International Table)British Thermal Unit to Calorie (Nutritional)British Thermal Unit to Calorie (Thermochemical)British Thermal Unit to ErgBritish Thermal Unit to Gram CalorieCalorie (15°C) to JouleCalorie (15°C) to KilojouleCalorie (15°C) to MegajouleCalorie (15°C) to GigajouleCalorie (15°C) to CalorieCalorie (15°C) to KiloCalorieCalorie (15°C) to Electron VoltCalorie (15°C) to ThermCalorie (15°C) to Foot-poundCalorie (15°C) to BTU per hourCalorie (15°C) to British Thermal UnitCalorie (15°C) to Calorie (International Table)Calorie (15°C) to Calorie (Nutritional)Calorie (15°C) to Calorie (Thermochemical)Calorie (15°C) to ErgCalorie (15°C) to Gram CalorieCalorie (International Table) to JouleCalorie (International Table) to KilojouleCalorie (International Table) to MegajouleCalorie (International Table) to GigajouleCalorie (International Table) to CalorieCalorie (International Table) to KiloCalorieCalorie (International Table) to Electron VoltCalorie (International Table) to ThermCalorie (International Table) to Foot-poundCalorie (International Table) to BTU per hourCalorie (International Table) to British Thermal UnitCalorie (International Table) to Calorie (15°C)Calorie (International Table) to Calorie (Nutritional)Calorie (International Table) to Calorie (Thermochemical)Calorie (International Table) to ErgCalorie (International Table) to Gram CalorieCalorie (Nutritional) to JouleCalorie (Nutritional) to KilojouleCalorie (Nutritional) to MegajouleCalorie (Nutritional) to GigajouleCalorie (Nutritional) to CalorieCalorie (Nutritional) to KiloCalorieCalorie (Nutritional) to Electron VoltCalorie (Nutritional) to ThermCalorie (Nutritional) to Foot-poundCalorie (Nutritional) to BTU per hourCalorie (Nutritional) to British Thermal UnitCalorie (Nutritional) to Calorie (15°C)Calorie (Nutritional) to Calorie (International Table)Calorie (Nutritional) to Calorie (Thermochemical)Calorie (Nutritional) to ErgCalorie (Nutritional) to Gram CalorieCalorie (Thermochemical) to JouleCalorie (Thermochemical) to KilojouleCalorie (Thermochemical) to MegajouleCalorie (Thermochemical) to GigajouleCalorie (Thermochemical) to CalorieCalorie (Thermochemical) to KiloCalorieCalorie (Thermochemical) to Electron VoltCalorie (Thermochemical) to ThermCalorie (Thermochemical) to Foot-poundCalorie (Thermochemical) to BTU per hourCalorie (Thermochemical) to British Thermal UnitCalorie (Thermochemical) to Calorie (15°C)Calorie (Thermochemical) to Calorie (International Table)Calorie (Thermochemical) to Calorie (Nutritional)Calorie (Thermochemical) to ErgCalorie (Thermochemical) to Gram CalorieErg to JouleErg to KilojouleErg to MegajouleErg to GigajouleErg to CalorieErg to KiloCalorieErg to Electron VoltErg to ThermErg to Foot-poundErg to BTU per hourErg to British Thermal UnitErg to Calorie (15°C)Erg to Calorie (International Table)Erg to Calorie (Nutritional)Erg to Calorie (Thermochemical)Erg to Gram CalorieGram Calorie to JouleGram Calorie to KilojouleGram Calorie to MegajouleGram Calorie to GigajouleGram Calorie to CalorieGram Calorie to KiloCalorieGram Calorie to Electron VoltGram Calorie to ThermGram Calorie to Foot-poundGram Calorie to BTU per hourGram Calorie to British Thermal UnitGram Calorie to Calorie (15°C)Gram Calorie to Calorie (International Table)Gram Calorie to Calorie (Nutritional)Gram Calorie to Calorie (Thermochemical)Gram Calorie to Erg

Did you know?

  • The joule is the SI unit of energy.
  • A kilowatt-hour measures electrical energy consumption.
  • The calorie used in nutrition is actually a kilocalorie.

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Common Conversions

Convert Joules to Kilocalories

J / 4184

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Convert KiloCalorie to Megajoule

How this conversion works

Converting KiloCalorie (kcal) to Megajoule (MJ) is straightforward with Unitly. We apply lossless base-unit math under the hood so you get consistent answers whether you are auditing data pipelines, planning infrastructure, or double-checking homework.

Quick reference: 1 kcal equals 0.004184 MJ. Conversely, 1 MJ equals 239.005736137667 kcal. Combine these ratios with the in-page calculator to convert any value instantly.

About KiloCalorie

Definition: A unit of energy equal to 1,000 gram calories, often used to express the energy content of food.

History: Also known as the "large calorie" or "food calorie," it was historically used to measure the energy content of food before the widespread adoption of the joule.

Current use: The most common unit for expressing the energy value of food and is what people typically refer to when they say "calorie" in a dietary context.

About Megajoule

Definition: A unit of energy equal to one million joules.

History: Used for large energy measurements.

Current use: Used for vehicle fuel efficiency and large energy systems.

Related conversions

Questions people ask

What is a joule?
A joule (J) is the SI unit of energy.
How do I convert joules to kilocalories?
Divide the number of joules by 4,184 to get kilocalories.

Need to cite your work? Pair these explanations with our JSON-LD schema (already embedded on the page) so search engines and analytics platforms understand the context behind each conversion.