Why doesn't it match the label exactly?
Labels may use adjusted factors or round grams; small differences are normal.
Meal Calorie Calculator
Add protein, carbs, and fat grams from a meal or recipe to get total calories.
Meal macros
Enter grams of protein, carbohydrates, and fat from a label or recipe.
About this calculator
How to use Meal Calorie Calculator, plus the formulas and logic behind the results.
Tool description
Nutrition labels list macros in grams. Multiplying by standard energy factors gives calories from each macro and the meal total.
How to use
- Read protein, carbs, and fat from a label or tracking app.
- Enter grams for each macro.
- Calculate total meal calories.
- Compare against your daily calorie and macro targets.
Formulas & reference
Protein kcal = g × 4Carbs kcal = g × 4Fat kcal = g × 9Total = sum of macro calories
Standard factors
- Protein — 4 kcal/g
- Carbohydrate — 4 kcal/g
- Fat — 9 kcal/g
Calculation logic
Each macro gram is multiplied by its kcal factor; results show per-macro and total calories.
Alcohol (~7 kcal/g) and fiber nuances are not included—enter carbs as listed on the label.
Meal Calorie Calculator FAQ
Common questions about this calculator and how to use the results.
Fiber?
Fiber is counted in total carbs on most labels; this tool uses the carb grams you enter.
Cooking oil?
Include fat grams from oils and dressings—they add up quickly.
Restaurant meals?
Use menu nutrition data when available; estimates are approximate.
Per serving?
Enter macros for one serving; multiply manually for batch recipes.
Alcohol?
Not included—add ~7 kcal per gram of alcohol separately if needed.