Food energy is labelled in calories in some countries and in kilojoules in others, so converting between them makes nutrition labels comparable wherever you are. This converter uses the exact relationship that one food calorie, also written as one kilocalorie, equals 4.184 kilojoules. Type a value into either box and the other updates immediately, so it works in both directions without a separate button. It handles decimals cleanly, which is handy for reading serving sizes and comparing products from different regions. The conversion is a fixed multiplication, so the results are precise rather than approximate. Everything is calculated locally in your browser and nothing is sent to a server, so it keeps working offline once loaded. Remember that the calorie used on food labels is the large calorie or kilocalorie, which is what this tool converts.
One food calorie equals about 4.184 kilojoules, so the tool multiplies or divides by that factor depending on direction.
Yes. The calorie on food labels is a kilocalorie, and this tool converts that value to and from kilojoules.
Yes. You can go from calories to kilojoules or from kilojoules back to calories.
Food energy is labelled in calories in some countries and in kilojoules in others, so converting between them makes nutrition labels comparable wherever you are. This converter uses the exact relationship that one food calorie, also written as one kilocalorie, equals 4.
Yes. Calories to Kilojoules Converter is completely free, with no sign-up and no usage limits.
Yes. Calories to Kilojoules Converter runs in any modern web browser. There is nothing to download or install.
Yes. Calories to Kilojoules Converter runs entirely on your device in your browser, so nothing you enter is uploaded to a server.