What does this tool do?
If you have the total calories and macronutrients for a recipe, dividing by the number of servings gives the per-serving values. This calculator also checks the stated calories against the energy implied by protein, carbohydrate and fat.
The Formula
Per serving = total ÷ servings; energy from macros = 4 × protein + 4 × carbs + 9 × fatFrequently Asked Questions
Why do the calories not match the macros exactly?
The 4/4/9 factors are averages. Fibre contributes fewer calories than carbohydrate, alcohol adds 7 kcal per gram, and labels may round or use different analytical methods.
Should I use raw or cooked ingredient weights?
Use whichever basis the nutrition data uses, and keep it consistent. Raw weights change as food absorbs water or loses fat during cooking, so a cooked dish should be weighed after cooking.