Joules to food Calories — nutrition-label energy
One food Calorie (the kind on nutrition labels) equals one kilocalorie, which is 4184 joules. This converter changes joules into the Calories shown on food packaging, and back again.
The capital-C “Calorie” used in nutrition is really a kilocalorie, so a 250 kcal snack contains 250 × 4184 = 1,046,000 J of energy. If your label is in kilojoules instead, divide the joule result by 1000 to get kJ.
Choose a direction, enter your number, and the answer appears instantly — all in your browser, with nothing uploaded.