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Macro Calculator – Splits daily calories into protein, carb, and f...

The Macro Calculator splits daily calories into protein, carb, and fat targets based on goals. This Macro Calculator uses an established clinical or fitness formula to give you a personalised estimate in seconds. Results are for educational reference — for specific health decisions, discuss with your doctor.

The formula behind this calculator: Allocates calories by percentage to each macronutrient, then converts using 4 cal/g (protein & carbs) and 9 cal/g (fat). As a practical example: A 2,000-calorie diet at 30/40/30 gives 150g protein, 200g carbs, and 67g fat. All results are calculated instantly in your browser — no data is stored or transmitted.

Macro Calculator FAQ

What does the Macro Calculator calculate?

Splits daily calories into protein, carb, and fat targets based on goals.

Why might my doctor's calculation differ?

Clinical assessments use additional factors, validated instruments, and professional judgement not captured in a general-purpose calculator.

Is this a substitute for medical advice?

No. These calculators provide general estimates for educational purposes only. Always consult a doctor or qualified health professional for medical decisions.

Is my data sent to a server?

No — calculations run directly in your browser. Your inputs are not stored or transmitted.