Macro calculator

Split daily calories into protein, carbs, and fat grams — with balanced, low-carb, keto, and high-protein presets.

Energy factors: protein and carbs 4 kcal/g, fat 9 kcal/g. Presets are P/C/F percentages.

Everything runs in this browser.

How to use

  1. Enter daily calories.
  2. Pick a preset or set the three percentages.
  3. Read grams per macro.

What it supports

Calories 500–10,000; protein/carbs/fat percentages must sum to 100 (±0.01). Grams use 4/4/9 kcal per g. A nutrition split, not a meal plan — it does not set calories for you.

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