OptiPin
Free calculators
Nine free, no-login tools for TRT, peptides, and GLP-1. Every calculation can also be tracked and forecast over time in OptiPin.
Peptide Reconstitution Calculator
Enter vial size, BAC water, and target dose for the exact syringe units. 200+ medications, typical-dose hints, and one-tap blend expansion (GLOW, KLOW, Wolverine, and more).
Peptide Blend Calculator
Multi-compound stacks (Wolverine, GLOW, KLOW, GH Stack) - tap a preset or build your own and get the exact per-peptide syringe units.
Free Testosterone Calculator
Vermeulen equation - total T, SHBG, and albumin → free and bioavailable testosterone and percent free.
TRT Dose Calculator
Weekly dose + concentration + frequency → mL and insulin units per injection, and how long a vial lasts.
Half-Life Visualizer
Plot single-dose and steady-state blood-level curves for 60+ compounds, with time to peak and steady state.
HCG Dose Calculator
Vial IU + bacteriostatic water + target dose → insulin units to draw, concentration, and doses per vial.
Vial Longevity & Cost
Doses and weeks per vial plus cost per dose - works for peptides (total mg) or oil vials (size × concentration).
GLP-1 Titration Schedule
The standard manufacturer titration for Wegovy, Ozempic, and Mounjaro/Zepbound, mapped to dates from your start date.
GLP-1 Pen Click Charts
What a "click table" means and the click-to-mg mechanics for Ozempic and Mounjaro/Zepbound pens - plus why Wegovy has no clicks. Reference only.
Low Testosterone Quiz
10-question ADAM screening questionnaire - see whether your symptoms match the low-testosterone pattern. Educational, not a diagnosis.
Track and forecast it all in OptiPin
Log doses, rotate sites, manage inventory, and forecast testosterone, estrogen & GLP-1 levels between blood draws - all on-device, no account required.
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