Macro Calculator — Get Your Ideal Macronutrient Split
Free macro calculator to find your ideal protein; carb; and fat ratio. Customize macros for weight loss; muscle gain; or maintenance.
Macronutrients — protein; carbohydrates; and fat — are the three nutrients your body needs in large quantities for energy and growth. The right macro split depends on your goals; activity level; and body composition. This calculator helps you determine exactly how many grams of each macronutrient to eat daily based on your TDEE and chosen diet approach.
How much protein do I need per day?
For general fitness; aim for 0.7-1.0 grams of protein per pound of body weight. If you are strength training or trying to build muscle; increase to 1.0-1.2 grams per pound. A 170-pound person doing moderate exercise needs roughly 119-170 grams of protein daily.
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About This Health Metric
This calculator uses established medical formulas to estimate your health metrics. While these calculations provide useful benchmarks for general health monitoring, they are based on population averages and may not account for individual factors such as body composition, genetics, medical conditions, or fitness level. Athletes, pregnant women, and individuals with certain health conditions may get results that do not accurately reflect their actual health status. Always consult a healthcare professional for personalized medical advice.
Key Information
| Parameter | Details |
|---|---|
| Balanced Split | 40% carbs / 30% protein / 30% fat |
| Low-Carb Split | 20% carbs / 40% protein / 40% fat |
| Protein Per Pound | 0.7-1.0g per pound of body weight |
| Calorie Per Gram | Protein 4 cal; Carbs 4 cal; Fat 9 cal |
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Use Calculator NowFrequently Asked Questions
How much protein do I need per day?
For general fitness; aim for 0.7-1.0 grams of protein per pound of body weight. If you are strength training or trying to build muscle; increase to 1.0-1.2 grams per pound. A 170-pound person doing moderate exercise needs roughly 119-170 grams of protein daily.
What is the best macro ratio for weight loss?
A popular weight loss macro split is 40% protein; 35% carbs; and 25% fat. Higher protein helps preserve muscle mass during a caloric deficit and increases satiety. However; the most important factor is maintaining a calorie deficit — macros help optimize body composition within that deficit.
Do I need to track macros every day?
Tracking macros daily is most effective when starting out or pursuing specific body composition goals. After a few weeks; most people develop an intuitive sense of portion sizes. Consistency matters more than perfection — hitting within 5-10 grams of each target is sufficient for results.
How accurate are online health calculators?
Online health calculators use established medical formulas and provide useful estimates for general guidance. However, individual factors like metabolism, medical conditions, and body composition can affect actual results. Always consult a healthcare professional for personalized advice.
What is a healthy BMI range?
BMI between 18.5-24.9 is normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese. BMI does not distinguish between muscle and fat, so athletes may show higher BMI without being overweight.
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Last updated: March 2026