Macros Per Serving Calculator

Protein / carbs / fat per serving from recipe totals; verifies kcal sum (P×4 + C×4 + F×9).

Inputs

Result

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How to use this calculator

  • Sum total grams of each macro from ingredients.
  • Set servings.
  • Read per-serving + total + macro ratio.

About this calculator

Macros (protein / carbs / fat) per serving give a more useful nutrition profile than calories alone. Atwater factors: 4 kcal/g for protein and carbs, 9 kcal/g for fat. The macro ratio (protein% / carb% / fat% of kcal) is how diets are categorized: keto runs 5/20/75, balanced 25/45/30, high-protein 35/40/25. Sum honestly — alcohol is 7 kcal/g, glycerol 4.3, but most home cooks can ignore those edge cases.

Frequently asked

Why doesn't my kcal match my macros?+
Most likely fiber (counts as carb but contributes ~2 kcal/g), alcohol (7 kcal/g), or sugar alcohols. Within ±10% is typical.
Do I include fiber in carbs?+
For total carb yes. For "net carbs" (keto): subtract fiber. For most diets, total carbs is the cleaner metric.
What's a healthy macro ratio?+
No single answer. USDA Acceptable Macronutrient Distribution Ranges: 10-35% protein, 45-65% carbs, 20-35% fat. Wide ranges by goal.
Cooking oils?+
Pure fat — 9 kcal/g, no protein or carbs. 1 tbsp oil = ~14g = ~120 kcal.
How precise should grams be?+
Within 1g per ingredient is plenty for home cooking. Athletes tracking competitive: 0.1g.

Related calculators

Calories Per Serving Calculator
Recipe total calories / number of servings = kcal per serving.
Protein Per Serving Calculator
Total protein / servings = grams per serving. Compare to body-weight-based daily target.
Fiber Per Serving Calculator
Total fiber / servings. Compare to FDA daily reference (25 g women, 38 g men).
Sugar Per Serving Calculator
Total added + natural sugars / servings. Compare to AHA daily limit (25g women, 36g men).
Sodium Per Serving Calculator
Total sodium mg / servings. Compare to FDA upper limit (2,300 mg/day).
Carbs Per Serving Calculator
Total carb / servings + net carbs (carbs − fiber). Critical for keto, diabetes management.

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