Free Macro Calculator
Protein, carbs, and fat targets from calorie intake.
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Inputs
Result
Protein
135 g (540 kcal)
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Short answer
Macros are calculated by choosing a protein target in g/kg, a fat percentage of calories (20–35% is standard), and filling the remainder with carbohydrates.
What is the Macro Calculator?
Macronutrient targets translate a calorie budget into grams of the three energy-yielding nutrients, driving both body-composition and performance outcomes.
How does the Macro Calculator work?
Set protein by body weight first, fat as a calorie share second, and back-solve carbohydrates to make the calorie math close.
Formula
Variables
ppkProtein per kg body weight (1.6–2.2)fat%Share of calories from fat (0.20–0.35)
Explanation
Protein is fixed by body weight; fat by calorie share; carbs balance the total to hit the calorie target.
Examples
Example 1: 2,500 kcal, 75 kg, recomp
Protein 135 g, fat 78 g, carbs ≈ 314 g.
Applications
- Body-composition goals
- Athletic performance
- Diabetic carb management
Advantages
- Protein target is evidence-based
- Balances lifestyle preferences with nutrient minimums
Limitations
- Ignores fiber, micronutrients, and food quality
Common mistakes
- Setting protein too low in a cut, losing lean mass
Tips
- Aim for ≥1.6 g/kg protein when in a deficit
Related concepts
The Macro Calculator sits inside the Health Calculators hub, in the nutrition & diet cluster. Energy targets and macronutrient planning. Understanding the terms below makes the output easier to interpret and easier to compare against neighbouring measures.
Practical use cases and industry applications
Understanding Macro
Macronutrient targets translate a calorie budget into grams of the three energy-yielding nutrients, driving both body-composition and performance outcomes. Within health calculators, macro belongs to the nutrition & diet cluster, where it shares terminology and assumptions with closely related tools.
Learning how macro is calculated
Protein is fixed by body weight; fat by calorie share; carbs balance the total to hit the calorie target. Working through the variables one at a time — ppk, fat% — makes the result reproducible by hand and easier to sanity-check.
Using macro to make a decision
Body-composition goals Athletic performance Diabetic carb management Because outputs depend on the assumptions you enter, run more than one scenario before committing to a figure.
How macro compares with related measures
energy balance, macronutrient split, hydration, thermic effect all describe adjacent aspects of nutrition & diet. Comparing this calculator's output against those measures — using the related tools listed on this page — prevents a single metric from being read in isolation.
Frequently asked questions
How much protein do I need?
1.6–2.2 g/kg is the well-supported range for adults training regularly, with the upper end favored during cuts.
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These tools share entities, formulas or user intent with the macro calculator.
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