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Home › Health › Macro Calculator

Macro Calculator

By the CalcMundi team · Updated October 22, 2026 · Formulas checked against standard financial math

Enter your details and goal to split your calories into protein, carbs and fat.

How it works

We estimate your calorie needs with the Mifflin-St Jeor equation, then split them: protein and carbs have 4 calories per gram, fat has 9.

This is a guide for healthy adults. Talk to a registered dietitian before major changes.

Frequently asked questions

How much protein?

Active adults commonly aim for 0.5 to 0.9 g per pound of body weight.

See also

Add this calculator to your website

Free for blogs, real estate agents, brokers and any site. Paste this code where you want the calculator to appear. It adjusts its height on its own.

Results are estimates for information only and are not financial, legal or medical advice. Rates, taxes and fees vary — confirm with a professional or your lender.