Macros breakdown: carbs and protein = 4 cal/g. Fat = 9 cal/g. Balance them for your goal.
For weight loss: 40/30/30 (carb/prot/fat). Muscle gain: 45/35/20. Keto: 5/30/65.
Use this calculator as a starting point for any health or fitness goal that requires a numeric benchmark. The result is an estimate, not a diagnosis — but it provides a concrete figure to track against over time.
Many users apply adult health classifications to children and teenagers, which is incorrect. Paediatric norms for height, weight, BMI, and body composition are age-and-sex-specific. Use age-appropriate reference tools for anyone under 18.
A nurse calculates a patient's health metric during a routine assessment, then uses the result alongside other clinical indicators to contextualise the finding — correctly treating the number as one data point among several rather than a standalone answer.
For muscle gain: 1.6–2.2g per kg bodyweight. For maintenance: 0.8g per kg.
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