To convert calories to kilojoules (cal to kJ) or to convert kilojoules to calories (kJ to cal), you may use the converter above. Alternatively, to find out how many kilojoules there are in "x" calories, you may use the calories to kilojoules table.
Below, you will find information of how to convert calories to kilojoules and how to convert kilojoules to calories, including the formulas and example conversions.
How to convert nutritional calories to kilojoules?
1 Nutritional calorie is equal to 4.184 kilojoules (kJ). To convert calories to kilojoules, multiply the calorie value by 4.184.
For example, to convert 200 cal to kJ, multiply 200 by 4.184, that makes 836.8 kJ in 200 cal.
nutritional calorie to kilojoules formula
kilojoules = calorie * 4.184
How to convert kilojoules to nutritional calories?
1 Kilojoule (kJ) is equal to 0.239005736 nutritional calories. To convert kilojoules to calories, multiply the kilojoule value by 0.239005736 or divide by 4.184.
For example, to convert 1000 kJ to cal, divide 1000 by 4.184, that makes 239 cal in 1000 kJ.
kilojoules to nutritional calories formula
calorie = kilojoule * 0.239005736
calorie = kilojoule * 4.184
Nutritional vs Small (Scientific) Calorie
Nutritional (food) Calorie is an energy unit and defined as the amount of energy to heat 1 kilogram of water to 1 degree Celsius. It is 1000 times higher than the scientific (small) calorie unit. 1 Nutritional calorie (kilocalorie) = 4.184 kilojoules. The symbol is "Cal".
Small Calorie is a metric energy unit and defined as the amount of energy to heat 1 gram of water to 1 degree Celsius. 1 Small (gram) calorie = 0.004184 kilojoules. The symbol is "cal".
Please visit energy and work units conversion to convert all energy and work units.