Calories Per Serving Calculator

The tool divides the total calories you enter by the number of servings, then rounds to the nearest whole calorie. So 1200 calories across 4 servings gives 300 per serving, and 950 across 3 gives 317.

The macro breakdown uses the Atwater factors: protein and carbohydrate are counted at 4 calories per gram and fat at 9 calories per gram. Alcohol, which this tool does not model, sits at about 7 calories per gram.

One serving. The gram fields sit under a label that reads grams per serving, so the calorie and percentage cards describe a single portion rather than the entire batch.

Each macro's calories are divided by the total macro calories and shown to one decimal place. For 120 protein, 160 carb and 90 fat calories the total is 370, giving 32.4, 43.2 and 24.3 percent.

The two calculators are independent. Calories per serving comes from the recipe total you enter, while the macro total comes from the grams you type, so rounding, fiber and missing macros can make them differ.

Add up the calories of every ingredient at the amount used. Package labels usually give calories per 100 grams or per portion, which you scale to the quantity in your dish before summing.

Yes. You can enter a fractional number of servings, such as 2.5, and the division still works. Servings must be greater than zero or the tool reports an input error.

No. All of the arithmetic happens locally in your browser and nothing is sent to a server, so your recipe figures stay on your device.

It gives a solid working estimate, but printed labels follow rounding rules and may treat fiber and sugar alcohols differently. Treat the numbers as a close guide rather than a certified label value.