kJ Vs Calories

WHAT IS THE DIFFERENCE? and what ther are used for

kJ (kilojoules) is a measure used on most labels to tell you how much energy there is in a particular food. Calories refers to the same unit of energy and are mostly used in prescribing diets and the common practice of calorie counting in controlling weight loss or food consumption.

To convert one to the other:

Simple divide the kJ by 4.18 to convert to calories.

Times the calories by 4.18 to convert to kJ.

i.e Diet based on 1200cal per day will equate to 5016kJ.