Macros to Calories Calculator
Turn protein, carbs, and fat grams into calories.
From grams to calories
Each macronutrient carries a fixed amount of energy: protein and carbohydrate at 4 calories a gram, fat at 9. This calculator totals them and shows how your calories are split.
Forty grams of protein, 60 of carbs, and 20 of fat come to 580 calories — roughly 28% protein, 41% carbs, and 31% fat. Seeing the split helps you tune a diet toward a goal.
Useful and private
The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
How many calories per gram?
Protein and carbohydrate provide 4 calories per gram; fat provides 9. The tool sums them and shows each share.
Why do the percentages matter?
The split between protein, carbs, and fat shapes a diet. Seeing it as percentages helps you balance macros to a goal.
Does it include alcohol or fiber?
No. It uses the standard protein, carb, and fat energy values.
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