Work out calories in a recipe instantly with clear inputs, formula shown and shareable results.
Energy uses the Atwater factors: 4 kcal per gram of carbohydrate and protein and 9 kcal per gram of fat, and kilojoules are kilocalories times 4.184. Fat carries more than twice the energy per gram, so the fat share of calories is usually much higher than the fat share of the recipe's weight.
Atwater factors
kcal = carbohydrate g x 4 + protein g x 4 + fat g x 9
Per serving
per serving = total kcal / servings
kcal = carbohydrate g x 4 + protein g x 4 + fat g x 9. Energy uses the Atwater factors: 4 kcal per gram of carbohydrate and protein and 9 kcal per gram of fat, and kilojoules are kilocalories times 4.184.
Fat carries more than twice the energy per gram, so the fat share of calories is usually much higher than the fat share of the recipe's weight.
Enter total carbohydrate, total protein, total fat, servings the recipe makes. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.