Macronutrient Calculator

Find the perfect balance of protein, carbs, and fats to fuel your body and achieve your fitness goals, whether you aim to lose fat, build muscle, or maintain your weight.

Calculate Your Daily Macros

kg

What Are Macronutrients?

Macronutrients, or "macros," are the three main nutrient groups your body needs in large quantities for energy and optimal health. Balancing them is crucial for achieving specific fitness outcomes.

  • Protein: The building block of muscle. Essential for repair, growth, and hormone production.
  • Carbohydrates: The body's primary fuel source, providing the energy needed for workouts and daily activities.
  • Fats: Crucial for hormone regulation, brain function, and absorbing essential vitamins.

Typical Macro Ratios by Goal

Goal Protein Carbs Fat
Weight Loss40%30%30%
Maintenance30%40%30%
Muscle Gain30%50%20%

Disclaimer: This calculator provides a general guideline. For personalized nutrition planning, consult a registered dietitian or certified nutritionist.

Maintained by Live Fitness Check. Last updated: August 9, 2026. How we test our calculators .

About This Calculator

Macronutrient Calculator converts a calorie target and selected goal into estimated daily protein, carbohydrate and fat targets. It is designed to give a quick, understandable estimate from daily calories and nutrition goal so the result can be used as a starting point for learning, tracking or a more informed discussion.

Methodology

Inputs used: Daily calories and nutrition goal.
Calculation approach: The calculator applies the goal-specific macronutrient percentages configured in the tool and converts calories from each macronutrient into grams.
Interpretation: Results are presented as an estimate and should be read together with the limitations described below.

Sources

USDA National Agricultural Library — Macronutrients and DRI resources: https://www.nal.usda.gov/human-nutrition-and-food-safety/food-composition/macronutrients

Frequently Asked Questions

What does the Macronutrient Calculator estimate?

Converts a calorie target and selected goal into estimated daily protein, carbohydrate and fat targets.

How is this result calculated?

The calculator applies the goal-specific macronutrient percentages configured in the tool and converts calories from each macronutrient into grams. The calculation uses daily calories and nutrition goal.

How should I use the result?

Macro ratios are not one-size-fits-all and may need adjustment for training, medical conditions, food preferences and clinician advice. Use the number as an estimate and consider professional advice when the result may affect health, treatment, pregnancy, nutrition, exercise safety or another important decision.