Calculation register
Methodology for onboarding calculations
These pages document the calculations used during onboarding: inputs, outputs, formulas, guardrails, and source references. They explain the app logic; they do not replace clinical judgment.
Last updated: June 15, 2026
How onboarding calculates BMI from height and weight, and why BMI is only used as a first-pass screening signal.
Open methodology 02 Body Fat and Lean Mass MethodologyHow onboarding resolves body fat percentage, lean mass, fat mass, and body surface area.
Open methodology 03 Calorie Target MethodologyHow onboarding calculates standard calories, lean-mass-adjusted maintenance, and the final target calories.
Open methodology 04 Macro Target MethodologyHow onboarding converts calories and lean mass into protein, fat, carbohydrate, sugar, and saturated-fat targets.
Open methodology 05 Fiber Target MethodologyHow onboarding generates the daily fiber target and the higher therapeutic fiber reference.
Open methodology 06 Protein Efficiency Curve MethodologyHow the article calculator interpolates source anchors into a simple protein-use efficiency percentage while separating absorption, muscle protein synthesis, and extended amino acid availability.
Open methodology 07 Hydration Target MethodologyHow onboarding estimates daily drinking water from demographic floor, body size, lean mass, activity, and climate exposure.
Open methodology 08 Activity Target MethodologyHow onboarding estimates Zone 2 minutes, strength sessions, and daily steps.
Open methodology 09 Target Rollover MethodologyHow optional target rollover adjusts today from yesterday without creating an infinite carry-forward loop.
Open methodology 10 Seasonal Calorie Adjustment MethodologyHow optional summer heat and winter cold exposure adjust calorie targets.
Open methodologyOptional adjustments such as target rollover and seasonal calories are documented separately so they can be audited without changing the base calorie, macro, hydration, fiber, or activity methodology.