Macro Calculator
Easily calculate your ideal macronutrient intake to support weight loss, muscle gain, or maintenance.
Personal Information
Goals & Diet Preferences
Your Macronutrient Plan
Calories
2000
Protein (g)
150
Carbs (g)
250
Fat (g)
67
Macronutrient Distribution
About Calculation Accuracy
This calculator is powered by the Mifflin-St Jeor equation, one of the most reliable formulas for estimating your basal metabolic rate (BMR).
Keep in mind: everyone’s metabolism is unique. Results may vary depending on muscle mass, lifestyle, and genetics. Use this as a starting guide, and adjust as you track your progress.
Why Macros Matter
Nutrition is the foundation of every fitness goal. Whether you want to burn fat, gain muscle, or maintain balance, tracking your macronutrients (protein, carbs, and fat) helps you fuel your body the right way.
Instead of guessing, this tool gives you a personalized breakdown so you know exactly how much energy your body needs to perform, recover, and thrive.
What Are Macros?
Macronutrients (macros) are the three major nutrients your body needs in large amounts:
Protein → builds and repairs muscles
Carbohydrates → main energy source for daily activities and workouts
Fats → support hormones, brain function, and long-lasting energy
Together, they provide all the calories your body runs on.
Why Use a Macro Calculator?
Tracking macros can help you:
Hit your weight goals faster and more effectively
Eat smarter for muscle growth or fat loss
Stay energized throughout the day
Learn more about your food choices and portion sizes
Think of it as a roadmap for your nutrition.
How to Use This Calculator
Enter your age, weight, height, and gender
Pick your activity level based on your weekly routine
Select your goal (lose, maintain, gain)
Choose a diet type (balanced, high-protein, low-carb, or keto)
Click Calculate My Macros to see your results instantly
Key Features & Benefits
✔ Calculates daily protein, carbs, and fats based on your personal needs
✔ Supports multiple diet styles (balanced, high-protein, low-carb, keto)
✔ Shows a visual macro distribution with percentages
✔ Uses science-backed formulas
✔ 100% free to use — no signup required
✔ Works seamlessly on desktop and mobile
Example Calculation
Let’s say you’re a 26-year-old woman, 160 cm tall, weighing 65 kg, with a moderately active lifestyle, and your goal is weight loss.
Your plan might look like this:
Calories: ~1,606 kcal
Carbs: ~201 g
Protein: ~120 g
Fat: ~36 g
👉 That’s about two medium bowls of rice, two chicken breasts, and a handful of nuts spread across the day.
Frequently Asked Questions
1. What's the difference between macros and calories?
Calories measure energy, while macros (protein, carbs, and fats) are the nutrients that supply those calories. Protein and carbs = 4 kcal per gram, fat = 9 kcal per gram.
2. How accurate is this macro calculator?
It uses the Mifflin-St Jeor equation, which is one of the most accurate formulas available. Still, your metabolism may differ, so think of this as a guide, not a strict rule.
3. Do I need to track macros every single day?
Not necessarily. Tracking daily is useful at first to learn portion sizes, but many people switch to a more flexible approach once they’re familiar with their nutrition needs.
Share Now
Found this Macro Calculator useful? Share it with your friends, family, or workout partners so they can plan their nutrition too!
Disclaimer: This tool provides general nutrition estimates based on scientific formulas. Your actual needs may differ. Always consult a qualified healthcare professional before making major dietary changes.