Public tools
Nine calculators. Every formula published.
Free, public, and auditable. Each tool documents its purpose and limitations, input definitions and units, methodology, a worked example, references, and validated safe ranges.
Protein Calculator
Free · PublicDaily protein targets by body weight, goal, and training load, with the evidence ranges behind each preset.
Methodology
Presets map to evidence ranges (0.8–2.2 g/kg/day) by goal and training status, with the supporting literature linked on the tool.
Open interactive toolTDEE Calculator
Free · PublicTotal daily energy expenditure using Mifflin-St Jeor with activity multipliers and their known error margins.
Methodology
Mifflin-St Jeor resting energy equation multiplied by activity factors; individual error can be ±10% or more, which the tool states.
Open interactive toolMacro Calculator
Free · PublicProtein, carbohydrate, and fat splits built on your TDEE, with unit-transparent math you can audit.
Methodology
Distributes TDEE across protein (set first, per kg), fat (percentage floor), and remaining carbohydrate. All arithmetic shown.
Open interactive toolBody-Fat Estimator
Free · PublicUS Navy circumference method with stated accuracy limits versus DEXA.
Methodology
US Navy circumference method. Correlates with DEXA within roughly ±3–4% for many users; hydration and tape placement shift results.
Open interactive toolHeart-Rate-Zone Calculator
Free · PublicTraining zones from measured or estimated max HR, including Karvonen heart-rate reserve.
Methodology
Five zones from measured max HR when available, or the Tanaka estimate (208 − 0.7 × age); optional Karvonen heart-rate-reserve mode.
Open interactive toolLongevity Assessment
Free · PublicA structured self-audit across sleep, activity, and metabolic markers. Educational, not diagnostic.
Methodology
Structured self-audit across sleep, activity, nutrition, and metabolic markers. Educational scoring only — not a diagnostic or predictive instrument.
Open interactive toolRecovery Assessment
Free · PublicReadiness scoring from subjective and objective inputs, with the limits of each signal explained.
Methodology
Combines subjective readiness with optional resting-HR trend. Signals are weighted transparently and their individual limits stated.
Open interactive toolPeptide Comparison Table
Free · PublicSide-by-side research status, FDA status, evidence grade, and risk profile for studied compounds.
Methodology
Side-by-side regulatory status, evidence grade, studied endpoints, and risk notes drawn from the same reviewed dataset as our guides.
Open interactive toolReconstitution Calculator
Free · PublicArithmetic only: vial amount, diluent, concentration, and draw volume for a clinician-supplied dose. Never recommends a dose.
Methodology
Pure arithmetic: concentration = vial amount ÷ diluent volume; draw volume = clinician-supplied dose ÷ concentration. It will never suggest a dose.
Open interactive tool