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Macronutrients are nutrients your body needs in larger amounts: protein, carbs, and fat.

Builds and repairs tissue. Aim for a source at each meal.

Primary fuel for activity. Prefer whole grains, fruit, and legumes.

Essential for hormones and vitamin absorption. Emphasize unsaturated sources.

Free online macronutrients guide. Protein, carbohydrates, and fats explained. No signup required — runs in your browser.

What is covered in Macronutrients Guide?: Protein, carbohydrates, and fats explained.
Is my health data sent to a server?: Calculators run in your browser. Food searches query USDA or Open Food Facts APIs — we do not require an account.
Do I need an account?: No signup is required. All nutrition tools on Online Tool Hub are free to use.