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Calorie Converter

Energy in food can be measured in calories or kilojoules. If you have a preference for one over the other use this tool to translate calories into kilojoules, or vice versa.


Enter the value in calories to calculate in kilojoules, or enter a value in kilojoules to convert to calories.

  • Calories
  • Kilojoules

Eating enough food to provide energy for body functions is vital but when we consume more energy (kilojoules) than we use we can gain weight. By knowing the energy value of foods we can estimate how much we’re taking in to make sure we don’t consume more than we need.

However energy is only one of the things to look out for when trying to eat a healthy, well-balanced diet. It’s also important to keep intake of salt and saturated fats down to lower your risk of high blood pressure, heart attack and stroke; and eat plenty of fruit and vegetables. Try eating healthy, ‘colourful’ meals too -a good mix of colour on your plate is usually a good start to ensure an adequate intake of a varied range of vitamins and minerals.

Have you tried our FoodSwitch app to help you make healthier choices when shopping? It helps you find out what's in the food you're eating and make simple switches to healthier choices for better health now and in the future. 

One Calorie (with an uppercase C) is also known as a ‘kilocalorie’ (1000 calories with a lower case c). This calculator coverts between Calories and kilojoules, where 1 Calorie equals 4 kilojoules, rounded to the nearest whole number.

This calculator has been reviewed by Bupa health professionals and is based on reputable sources of medical research. It is not a diagnostic tool and should not be relied on as a substitute for professional medical or other professional health advice.

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