Macronutrients
Macro Calculator
Determine daily protein, fat, and carb targets aligned with calorie goals. Sets protein first (1.9 g/kg), dietary fat at 28% of calories, then allocates remaining calories to carbohydrates. Practical macro planning for body composition diet adherence.
System Units
Awaiting Calculator Inputs
Fill in the fields above and hit Calculate to generate your body composition targets.
Formula & Math
Sets protein first, estimates dietary fat as a calorie share, then allocates remaining calories to carbohydrates.
How to Interpret
Macros are planning targets. Keep them flexible enough to support adherence.
Plan Integration
Take these estimations back to the main Strategy Finder assessment, or save them in your tracking logs in the local dashboard.
Macro Split: Structure Your Caloric Intake
Science & physiological analysis for strategy selection
Reviewed by Divy Yadav, CSCS
Last updated: June 27, 2026 · BodyCompOS Editorial Board
While total calorie intake determines whether you lose or gain weight, your macronutrient (macro) split governs the quality of that change. Carbohydrates fuel high-intensity training and replenish glycogen, protein builds and preserves muscle tissue, and dietary fats regulate hormones and joint health. The BodyCompOS Macro Calculator structures your daily intake by prioritizing protein first, setting dietary fats at a healthy 28% of total calories, and allocating the remaining energy to carbohydrates, creating a sustainable balance for active individuals.
1. How to Use & Apply This Target
Input your target daily calories, current body weight, and strategy goal. prioritising protein intake is crucial; hit this target daily. Allocate your remaining fat and carb macros with a degree of flexibility. Focus on dietary consistency rather than hitting every gram exactly, as this supports long-term adherence.
2. Mathematical Assumptions & Formula Logic
This calculator sets protein at a goal-adapted rate: 1.9 g/kg (about 0.86 g/lb) for general recomposition. Fats are set at 28% of total daily calories, and carbs are allocated the remaining calories. Energy content assumes: protein and carbohydrates contain 4 kcal per gram, and dietary fat contains 9 kcal per gram.
3. Step-by-Step Worked Mathematical Example
Frequently Asked Questions
Q:Should I follow a low-carb diet for fat loss?
For body composition, research consistently shows that low-carb and low-fat diets yield similar fat loss results when calories and protein are matched. Because resistance training relies heavily on glycogen, keeping carbohydrates in your diet is generally superior for supporting training performance.
Q:Can I adjust my fat intake?
Yes. While this calculator sets fats at a baseline of 28% of total calories, a range of 20% to 35% is acceptable. Ensure you do not drop below 15-20% of calories from fat for extended periods, as this can negatively impact hormone production and lipid-soluble vitamin absorption.
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