Macro Calculator
Build a transparent starting macro split for your daily energy target.
Your Macros Result
Result status:
Practical interpretation
Important: Estimate only—not medical advice.
How the Macro Calculator works
Formula: Calories = goal-adjusted TDEE; protein = the lower of 1.6 g/kg (0.7 g/lb) or 35% of calories; fat = 25% of calories ÷ 9; carbohydrate = remaining calories ÷ 4.
The calculator prioritizes an evidence-based protein target (capped at 35% of energy), assigns a moderate fat share, and fills remaining energy with carbohydrate.
Assumptions and limits: Macro distributions are flexible and specialized clinical or sport requirements may differ. Results are estimates for education and planning, not medical advice.
How to use your result
Use the result as a starting point, not a pass-or-fail score. Keep your inputs consistent, observe relevant trends over time, and adjust only when the trend—not one day—shows the estimate does not fit your needs.
Body measurements and equation-based targets always contain uncertainty. If your result conflicts with symptoms, a diagnosis, medication guidance, pregnancy needs, an eating-disorder recovery plan, or instructions from your care team, follow your qualified health professional.
Frequently Asked Questions
What does the Macro Calculator calculate?
It estimates estimate daily protein, carbohydrate, and fat targets. from the information you enter. It is a planning and screening estimate, not a diagnosis or individualized medical prescription.
Which formula does this Macro Calculator use?
This tool uses Calories = goal-adjusted TDEE; protein = the lower of 1.6 g/kg (0.7 g/lb) or 35% of calories; fat = 25% of calories ÷ 9; carbohydrate = remaining calories ÷ 4.. The formula and every adjustment are shown on this page so you can understand the assumptions.
Can I use metric or imperial units?
Yes. Choose metric or imperial before entering body measurements. Imperial values are converted to kilograms and centimeters before the formula runs.
How accurate is this Macro Calculator?
Population equations provide useful starting estimates but cannot measure your individual physiology. Macro distributions are flexible and specialized clinical or sport requirements may differ.
Who should not rely on this result alone?
Children, pregnant or breastfeeding people, competitive athletes with specialized needs, and anyone managing a medical condition should seek advice from a qualified health professional.
How often should I recalculate?
Recalculate when your body weight, activity, goal, or other relevant input changes meaningfully. Small day-to-day fluctuations generally do not warrant a new target.
Why might my result differ from another calculator?
Calculators may use different equations, activity factors, rounding rules, or definitions. Compare the documented methods rather than assuming one number is exact.
Is this result medical advice?
No. This educational estimate cannot account for diagnoses, medications, laboratory results, or clinical fluid and nutrition restrictions. Consult a licensed professional for personal medical advice.
Scientific References
- International Society of Sports Nutrition position stand: protein and exercise Journal of the International Society of Sports Nutrition
- Dietary Reference Intakes: macronutrients and fiber National Academies Press
- Body Weight Planner and energy balance information National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)