Cal to Joule conversion

With the tool on the page, you can automatically translate between Cal and Joule weight measurements. The conversion process you will make works automatically based on the calorie joule conversion formula. To perform the conversion, simply enter the value you want in the box below and press the “Convert” button. The result will appear immediately below.

Cal to Joule conversion

  • Calorie Unit Type
  • Energy in calories
  • Conversion result
  • J

How to convert from Cal to Joule?

Things to consider when choosing a calorie unit type:

  • Small calorie (cal) is the energy required to raise 1 gram of water by 1°C at 1 atmosphere of pressure.
  • Large calorie (Cal) is the energy required to raise 1 kg of water at 1 atmosphere pressure by 1°C.
  • Large calorie is also called food calorie and is used as a unit of food energy.

Converting thermochemical calories to joules:

1 calth = 4.184 J

Converting 15°C calories to joules:

1 cal15 = 4.1855 J

Converting large/food calories to Joules:

1 Cal = 4.184 kJ = 4184 J

Cal Joule conversion formula

Energy in joules E(J) is equal to 4.184 times the energy in a thermochemical E(calth) calorie:

E (J) = 4.184 × E(calth)

Energy in joules E(J) is equal to 4.1855 times the energy in 15 °C calorie E(cal15):

E(J) = 4.1855 × E(cal15)

Energy in joules E(J) is equal to 4184 times the energy in large / food calorie E(Cal):

E(J) = 4184 × E(cal)


Converting 300 calth to joules:

E(J) = 4.184 × 300calth= 1255.2 J

Converting 300 cal15 to joules:

E(J) = 4.1855 × 300cal15 = 1255.65 J

Converting 0.3 Cal to joules:

E(J) = 4184 × 0.3 Cal = 1255.2 J

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