Macro Calculator
Calculate your optimal macronutrient ratio for weight loss, muscle gain, or maintenance. This macronutrient calculator determines your protein, carb, and fat needs.
What is a Macro Calculator?
This Macronutrient Calculator helps you determine the optimal split of protein, carbohydrates, and fats for your specific body type and goals. While calories determine weight gain or loss, macros determine body composition—how much muscle you build versus how much fat you burn.
Understanding the Three Macros
Your body requires three main nutrients in large amounts (macro-nutrients) to function:
- Protein (4 kcal/g): Essential for muscle repair and growth. It is crucial for anyone looking to build strength or preserve muscle while losing weight.
- Carbohydrates (4 kcal/g): The body's primary energy source. High-intensity workouts generally require sufficient carb intake.
- Fats (9 kcal/g): Vital for hormone production and nutrient absorption.
Macros for Weight Loss
When using a protein carb fat calculator for weight loss, the goal is to maintain a calorie deficit while keeping protein high.
- Recommendation: Choose the "Lose Weight" goal and consider the "High Protein" or "Low Carb" plan.
- Why: High protein keeps you full longer and protects muscle mass during a caloric deficit.
Macros for Muscle Gain
For building size, you need a calorie surplus.
- Recommendation: Choose the "Gain Muscle" goal and the "Balanced" or "High Protein" plan.
- Why: You need ample protein for tissue building and sufficient carbs to fuel heavy lifting sessions.
Which Diet Plan Should You Choose?
- Balanced (30% P / 35% C / 35% F): Best for general health and sustainable weight management.
- High Protein (40% P / 30% C / 30% F): Best for athletes, bodybuilders, and cutting fat.
- Low Carb (40% P / 20% C / 40% F): Best for those who are insulin sensitive or prefer a ketogenic-style approach.
For a simpler calorie-only view, check our Maintenance Calorie Calculator or calculate your BMI.
? Frequently Asked Questions
No. Think of them as targets. Being within +/- 5 to 10 grams of your daily goal is considered success.
For healthy individuals with normal kidney function, high protein diets (up to 1g per pound of body weight) are safe and effective for body composition.
A moderate carbohydrate reduction with increased protein (e.g., 40% Protein, 30% Fat, 30% Carbs) is often cited as the most effective for satiety and fat loss.
Technically yes, but fibrous vegetables have very few net carbs. Many people track them loosely or not at all compared to starchy carbs like rice or pasta.