Nutrition Per Serving Calculator
Divide a recipe's total calories into per-serving amounts. Ideal for meal preppers, dieters, and anyone tracking calories for homemade dishes.
Last updated: September 2026
Formula below · 2 sources (fdc.nal.usda.gov, Wikipedia) · Updated Sep 2026
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About this calculator
When you cook a recipe from scratch, nutrition labels don't exist — you have to calculate them yourself. This calculator divides the total nutritional content of your entire recipe by the number of servings to give you per-serving values. The core formula is: Calories per serving = totalCalories / servings. The calculator handles calories; the same division works for protein, carbohydrate and fat if you total those yourself. By summing up the nutrition of every ingredient first (using package labels or a food database), then entering the totals here, you get an accurate breakdown that mirrors what a commercial nutrition label would show. This is essential for anyone following a calorie-controlled or macro-tracked diet.
How to use
Suppose you make a large pot of chili totaling 2,400 calories and split it into 8 servings. Enter 2,400 and 8. Calories per serving = 2,400 / 8 = 300 kcal. If the pot also has 180 g protein, 240 g carbs and 80 g fat, divide each by 8 the same way: 22.5 g protein, 30 g carbs and 10 g fat per serving.
Frequently asked questions
How do I find the total calories and macros for a homemade recipe?
Add up the nutritional information for every individual ingredient you use. Check the nutrition label on packaged items, and use a food database like USDA FoodData Central or Cronometer for whole foods. Make sure you weigh or measure each ingredient accurately before cooking, since cooking can change weights through water loss. Once you have totals for every ingredient, sum them all together and enter the grand totals into this calculator.
Why do calories per serving differ from what a restaurant or store label shows?
Serving sizes are defined by whoever prepares the food, so two versions of the same dish can have very different per-serving numbers simply because one uses a larger serving size. Homemade recipes also vary in exact ingredient amounts and cooking methods, which affects fat absorption and moisture content. Using this calculator on your specific recipe gives you a personalized and accurate figure rather than a generic estimate. Always re-run the calculation if you change ingredient quantities or the number of portions.
What is the difference between calories and macronutrients, and why should I track both?
Calories measure total energy, while macronutrients — protein, carbohydrates, and fat — are the three categories of nutrients that provide those calories (4 kcal/g for protein and carbs, 9 kcal/g for fat). Tracking only calories tells you about energy balance, but tracking macros tells you about diet composition, which matters for goals like muscle building, fat loss, or blood sugar management. For example, two meals with 300 calories can have very different effects on satiety and performance depending on their macro ratios. Monitoring both gives you a fuller picture of your nutritional intake.