Meal Calorie Calculator
Work out a meal's calories from its protein, carbs and fat using the Atwater factors (4/4/9 kcal per gram), and see the macro split. An estimate — label values and portion sizes are the usual source of error.
Calories in this meal
415 kcal
Protein 120 kcal · Carbs 160 kcal · Fat 135 kcal.
Macro split
Protein — 30 g120 kcal (28.9%)
Carbs — 40 g160 kcal (38.6%)
Fat — 15 g135 kcal (32.5%)
Label values and portion sizes are the usual source of error — weigh food for a week if your totals look wrong.
Formula & source — Atwater factors (Atwater & Woods, 1896; USDA)
Calories = protein (g) × 4 + carbs (g) × 4 + fat (g) × 9 + alcohol (g) × 7. These are the standard energy values used on nutrition labels.
Estimate, not medical advice. FitCalc results are estimates based on population-average formulas. They are not a diagnosis, a prescription, or a substitute for professional medical advice. If you have a medical condition, are pregnant, or take medication, talk to a doctor or registered dietitian before changing your diet or exercise. FitCalc claims no medical credentials.
Try next: Macro Calculator · Protein Calculator · Keto Macro Calculator