Meal Calorie Calculator

Meal Calorie: calories from Protein, Carbs & Fat

Calculate meal energy from protein, carbohydrate, fat and optional alcohol grams without relying on a food database.

How to use the Meal Calorie Calculator

1. Enter protein, carbohydrate, fat and the other fields relevant to this calculation.
2. Select any method, activity level or option shown on this page, then choose Calculate.
3. Read the main result together with the supporting values, method, assumptions and limitations below before using the estimate.

How this calculation works

Macronutrient energy uses 4 kcal/g for protein, 4 kcal/g for carbohydrate, 9 kcal/g for fat and 7 kcal/g for alcohol when entered.

Example calculation

The sample values loaded into the calculator produce 540 kcal. This example exists to show how the output is structured; replace the sample values with your own inputs for your calculation.

Assumptions and limitations

• Energy and nutrient outputs are estimates or general reference values, not individualized treatment targets.
• Adult calorie-goal tools should not be used for children, pregnancy or medical nutrition therapy unless the page explicitly supports that life stage.

Sources and review status

Source set last verified 2026-09-25. No clinician review is claimed unless a real named reviewer is displayed.

Connected tools

Continue with the closest related calculation without re-entering sensitive values automatically.