Kilojoule to Calorie (nutritional) Conversion

Convert between Kilojoule and Calorie (nutritional) quickly and accurately.

kJ
cal

How to Convert Kilojoule to Calorie (nutritional)

Conversion Formula

1 kJ = 0.239 cal
1 cal = 4.187 kJ

Example

Convert 15 kJ to cal:

15 kJ = 15 × 0.239 cal = 3.583 cal

Unit Information

Learn about the energy units you're converting between

Kilojoule

kJ

Definition

A kilojoule (symbol: kJ) is a unit of energy equal to 1,000 joules. It is commonly used for measuring larger amounts of energy in food, exercise, and industrial applications. One kilojoule equals approximately 0.239 kilocalories.

History/Origin

The kilojoule was introduced as a practical unit for measuring larger energy quantities in the metric system. It became widely used in the late 20th century for food labeling and energy consumption measurements.

Current Use

Kilojoules are extensively used in nutrition labeling worldwide, exercise physiology for measuring energy expenditure, industrial energy consumption monitoring, and scientific research for measuring moderate energy quantities.

Multiplier

1000

Offset

0

Calorie (nutritional)

cal

Definition

A nutritional calorie (symbol: cal) is a unit of energy used in nutrition, equal to 4,186.8 joules. It represents the amount of energy needed to raise the temperature of one kilogram of water by one degree Celsius.

History/Origin

The calorie was originally defined in the 19th century for measuring heat energy. The nutritional calorie became standardized for food labeling and remains widely used in the United States for dietary energy measurements.

Current Use

Nutritional calories are used in food labeling in the United States, dietary planning and nutrition counseling, exercise and fitness tracking, weight management programs, and metabolic research in health and medicine.

Multiplier

4186.8

Offset

0

Kilojoule to Calorie (nutritional) Conversion Table

Kilojoule [kJ] Calorie (nutritional) [cal]
1 kJ 0.238846 cal
10 kJ 2.388459 cal
25 kJ 5.971147 cal
50 kJ 11.942295 cal
100 kJ 23.88459 cal
0 kJ 0E+0 cal
-10 kJ -2.388459 cal
-40 kJ -9.553836 cal

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