Free tools
Evidence-based nutrition calculators
Quick, accurate, no signup. Built on the same equations nutrition professionals actually use — Mifflin-St Jeor for calories, ISSN ranges for protein, EFSA for hydration.
Calorie & TDEE Calculator
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How many calories you actually need — based on the formula validated in research, not gym broscience.
Macro Calculator
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Daily protein, carbs, and fat targets matched to your goal and preference.
Water Intake Calculator
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How much water you really need. Spoiler: probably not 8 glasses.
Protein Calculator
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Daily protein target with per-meal split — based on sport-nutrition research.