Calories To Kilojoules (kJ) Conversion Calculator

Calories to Kilojoules (kJ) conversion

Calories (cal) to kilojoules (kJ), energy conversion calculator and how to convert.

  • Calories to kJ conversion calculator
  • How to convert calories to kJ

Calories to kilojoules conversion calculator

Select calorie unit type, enter the energy in calories and press the Convert button:

Select calorie unit type: Small thermochemical calories Small 15°C calories Large/food calories
Enter energy in calories:
Energy result in kilojoules: kJ

kJ to calories conversion ►

Small & large calories

Small calorie (cal) is the energy needed to increase 1 gram of water by 1°C at a pressure of 1 atmosphere.

Large calorie (Cal) is the energy needed to increase 1 kg of water by 1°C at a pressure of 1 atmosphere.

Large calorie is also called food calorie and is used as a unit of food energy.

How to convert from calories to kilojoules

Thermochemical calories to kJ

1 calth = 0.004184 kJ

1 kJ = 239.005736 calth

The energy in kilojoules E(kJ) is equal to the energy in thermochemical calories E(calth) divided by 239.005736:

E(kJ) = E(calth) / 239.005736

Example

Convert 300 calth to kilojoules.

E(kJ) = 300calth / 239.005736 = 1.2552 kJ

15°C calories to kJ

1 cal15 = 0.0041855 kJ

1 kJ = 238.9201 cal15

The energy in kilojoules E(kJ) is equal to the energy in 15°C calories E(cal15) divided by 238.9201:

E(kJ) = E(cal15) / 238.9201

Example

Convert 300 cal15 to kilojoules.

E(kJ) = 300cal15 / 238.9201 = 1.25565 kJ

Large/food calories to kJ

1 Cal = 4.184 kJ

1 kJ = 0.239 Cal

The energy in kilojoules E(kJ) is equal to 4184 times the energy in large/food calories E(Cal):

E(kJ) = 4.184 × E(calth)

Example

Convert 0.3 Cal to kilojoules.

E(kJ) = 4.184 × 0.3 Cal = 1.2552 kJ

kJ to calories conversion ►

See also

  • kJ to calories conversion
  • Calories to joules conversion
  • Calories to kcal conversion
  • Watt
  • Volt
  • dBm
  • Electrical voltage
  • Electric power
  • Power conversion

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