Macro Calculator — Protein, Carb & Fat Targets for Weight Loss & Muscle Gain

Last reviewed: April 2026

The macronutrient calculator converts your daily calorie goal into specific gram targets for protein, carbohydrates, and fat based on your diet goal and eating style. Macronutrient ratios — often called "macros" — determine not just how many calories you eat, but where those calories come from. Protein supports muscle repair and satiety; carbohydrates are the body's primary energy source; fats support hormones, brain function, and fat-soluble vitamin absorption. The right balance depends heavily on your goals: someone building muscle needs more protein; a person following a ketogenic diet dramatically restricts carbohydrates; endurance athletes typically require higher carbohydrate intake. This tool supports Standard, Low-Carb, Ketogenic, and High-Protein macro splits. Don't yet know your calorie goal? Calculate your TDEE first →

Calculate Your Macro Targets

kcal
Don't know yours? Calculate TDEE → Please enter a calorie goal between 800–6,000 kcal.
Please select a diet goal.

🔒 Your numbers stay in your browser — nothing is sent to any server.

Daily Calories
—
·
Goal
—
·
Diet Style
—
Protein
—
— kcal · — %
Carbohydrates
—
— kcal · — %
Fat
—
— kcal · — %

Macro Splits Comparison

Diet Style Protein Carbs Fat Ratio Best For
Protein

4 kcal per gram. Essential for building and repairing muscle tissue, producing enzymes and hormones, and supporting immune function. High protein intake increases satiety, which is especially helpful during weight loss. Common sources: chicken, fish, eggs, Greek yogurt, legumes, tofu.

Carbohydrates

4 kcal per gram. The body's preferred and most efficient energy source. Glucose from carbs fuels the brain and muscles during exercise. Complex carbs (whole grains, legumes, vegetables) digest slowly and provide sustained energy. Simple carbs (sugar, refined flour) are fast-digesting.

Fat

9 kcal per gram. Essential for absorbing fat-soluble vitamins (A, D, E, K), producing hormones including testosterone and estrogen, and protecting organs. Unsaturated fats (avocado, olive oil, nuts) are heart-healthy. Saturated and trans fats should be limited. Fat is the most calorie-dense macro.

⚕ Reference Only: Macro targets are general reference estimates based on common nutritional guidelines. Individual needs vary based on health conditions, medications, activity level, and metabolic factors. For a personalized nutrition plan, consult a registered dietitian or your healthcare provider. Not intended for use by individuals with a history of disordered eating or restrictive eating disorders. This calculator is designed for adults 18 and older; adolescents should consult their pediatrician or a registered dietitian.

Want to track and improve your results? These tools can help:

Affiliate disclosure: We may earn a commission if you sign up through these links, at no cost to you.

Sources & Methodology

Macro ranges: Based on the Acceptable Macronutrient Distribution Ranges (AMDR) from the USDA Dietary Guidelines for Americans 2020–2025. Standard distribution: Protein 10–35%, Carbohydrates 45–65%, Fat 20–35% of total calories. Calorie values: Protein = 4 kcal/g · Carbohydrates = 4 kcal/g · Fat = 9 kcal/g.
Sources: USDA Dietary Guidelines for Americans 2020–2025 (dietaryguidelines.gov); Institute of Medicine Dietary Reference Intakes. Keto, low-carb, and high-protein distributions reflect commonly used ranges from clinical and sports nutrition literature.

Last reviewed: April 2026