Calculators
Free peptide-dosing calculators. No signup. Math you can verify.
Every calculation runs in your browser — nothing is sent to a server, nothing is stored. You can read the formulas, copy-paste the math into a spreadsheet, and double-check us. We'd rather you trust the answer because you verified it than because we said so.
These tools illustrate dose math; they are not medical advice. Discuss any clinical decision with your prescribing clinician.
Peptide reconstitution
Vial mg + bacteriostatic water + dose target → concentration, IU on your insulin syringe, doses per vial.
BPC-157, Tirzepatide, Sermorelin, Tesamorelin scenarios pre-loaded.
Open calculator →
GLP-1 dose escalation
Pick your medication and start date — see your current step, the dose timeline, and weeks until maintenance.
Semaglutide / Tirzepatide / Liraglutide schedules per FDA prescribing information.
Open calculator →
Half-life + steady-state plasma
Standard one-compartment model. Plot plasma concentration over time; see when steady state is reached.
Useful for sustained-action peptides (BPC-157, Tesamorelin, GLP-1s) vs pulsatile (CJC, Ipamorelin).
Open calculator →
GLP-1 weight-loss projection
Starting weight + medication → projected trajectory across 68 weeks based on landmark trial data.
STEP-1 (semaglutide), SURMOUNT-5 (tirzepatide), TRIUMPH-1 (retatrutide).
Open calculator →
Why no accounts? Calculators with logins exist to harvest your data. Ours don't. If you want to save a calculation, screenshot it or paste the inputs into a document. The browser does the math; we don't see it.