ConverterHub

Low-Carb Macro Calculator

Enter your calories and carb/protein percentages to get your low-carb macro grams.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

The calculator turns daily calories and target carb and protein percentages into gram amounts: carb grams = (calories × carb%) ÷ 4 and protein grams = (calories × protein%) ÷ 4, since carbs and protein both provide 4 calories per gram, while the remaining percentage of calories is assigned to fat and divided by 9 calories per gram to get fat grams.

People following a low-carb, keto, or macro-tracking diet use this to translate a calorie target and a chosen macro split (for example 10% carbs, 30% protein, 60% fat) into the actual gram targets they log in a food-tracking app, rather than doing the per-meal arithmetic by hand.

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