Kilojoules To Calories Conversion


1 kJ = 238.8458966275 cal

Want to convert from calories to kilojoules instead?

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How to convert kilojoules to calories (kJ to cal)

The formula for converting kilojoules to calories is: cal = kJ × 238.8458966275. To calculate the kilojoule value in calories first substitute the kilojoule value into the preceding formula, and then perform the calculation. If we wanted to calculate 1 kilojoule in calories we follow these steps:

cal = kJ × 238.8458966275

cal = 1 × 238.8458966275

cal = 238.8458966275

In other words, 1 kilojoule is equal to 238.8458966275 calories.

Example Conversion

Let's take a look at an example. The step-by-step process to convert 3 kilojoules to calories is:

  1. Understand the conversion formula: cal = kJ × 238.8458966275
  2. Substitute the required value. In this case we substitute 3 for kJ so the formula becomes: cal = 3 × 238.8458966275
  3. Calculate the result using the provided values. In our example the result is: 3 × 238.8458966275 = 716.5376898825 cal

In summary, 3 kilojoules is equal to 716.5376898825 calories.

Converting calories to kilojoules

In order to convert the other way around i.e. calories to kilojoules, you would use the following formula: kJ = cal × 0.0041868. To convert calories to kilojoules first substitute the calorie value into the above formula, and then execute the calculation. If we wanted to calculate 1 calorie in kilojoules we follow these steps:

kJ = cal × 0.0041868

kJ = 1 × 0.0041868

kJ = 0.0041868

Or in other words, 1 calorie is equal to 0.0041868 kilojoules.

Conversion Unit Definitions

What is a Kilojoule?

A kilojoule (kJ) is a metric unit of energy in the International System of Units (SI). One kilojoule is equal to 1,000 joules. It is commonly used in nutrition and chemistry to express the energy content of foods and the energy released or absorbed in chemical reactions.
In the context of nutrition, kilojoules are often used to measure the energy value of foods and beverages. The energy we obtain from the food we eat is usually expressed in kilojoules or kilocalories (commonly referred to as calories). One kilocalorie is approximately equal to 4.184 kilojoules.
In chemical reactions, especially in the field of thermodynamics, energy changes are frequently measured in joules or kilojoules. The prefix "kilo-" denotes a factor of 1,000, so 1 kilojoule is equivalent to 1,000 joules.

What is a Calorie?

A calorie (cal) is a unit of energy commonly used in nutrition. It represents the amount of energy required to raise the temperature of one gram of water by one degree Celsius (or one degree Kelvin). In the context of nutrition, the term "calorie" usually refers to a kilocalorie, which is equal to 1,000 calories in scientific terms.
The energy content of food and beverages is often measured in kilocalories, abbreviated as kcal or Cal (with an uppercase "C" to distinguish it from the smaller "cal" used in physics).
In scientific terms, 1 kilocalorie is equal to 4.184 kilojoules (kJ). The conversion factor between kilocalories (kcal) and kilojoules (kJ) is 1 kcal = 4.184 kJ.
In everyday language, when people refer to the number of calories in food, they are usually referring to kilocalories. For example, if a food label says a serving contains 200 calories, it means 200 kilocalories or 200,000 calories in scientific terms.

Kilojoules To Calories Conversion Table

Below is a lookup table showing common kilojoules to calories conversion values.

Kilojoule (kJ)Calorie (cal)
1 kJ238.8458966275 cal
2 kJ477.691793255 cal
3 kJ716.5376898825 cal
4 kJ955.38358651 cal
5 kJ1194.2294831375 cal
6 kJ1433.075379765 cal
7 kJ1671.9212763925 cal
8 kJ1910.76717302 cal
9 kJ2149.6130696475 cal
10 kJ2388.458966275 cal
11 kJ2627.3048629025 cal
12 kJ2866.15075953 cal
13 kJ3104.9966561575 cal

Other Common Kilojoule Conversions

Below is a table of common conversions from kilojoules to other energy units.

1 kilojoule in joules1000 J
1 kilojoule in megajoules0.001 MJ
1 kilojoule in gigajoules0.000001 GJ
1 kilojoule in kilocalories0.2388458966275 kcal
1 kilojoule in watt hours0.27777777777778 Wh
1 kilojoule in kilowatt hours0.00027777777777778 kWh
1 kilojoule in watt seconds1000 Ws
1 kilojoule in electron volts6241509074461000000000 eV
1 kilojoule in mega electron volts6241509074461000 MeV