Free Tool
Peptide reconstitution calculator
Three inputs — vial size, bacteriostatic water, target dose. Four outputs — concentration, injection volume, exact U-100 syringe units, and doses per vial. No account, no cost, no math errors.
Worked example
Vial size
10 mg
BAC water
2 mL
Desired dose
500 mcg
Result
Concentration 5 mg/mL · Draw 0.1 mL = 10 units on a U-100 syringe · 20 doses per vial
The math: 10 mg ÷ 2 mL = 5 mg/mL. 500 mcg ÷ 5,000 mcg/mL = 0.1 mL = 10 units. Want to understand it fully? Read the reconstitution guide.
Also in the app
Tirzepatide titration
The 2.5 → 15 mg trial schedule, mapped to your vial concentration.
Semaglutide dosing
STEP-schedule titration from 0.25 mg with per-step syringe units.
Retatrutide titration
Phase-2 escalation reference with weekly reminders.
Frequently asked questions
How does a peptide reconstitution calculator work?
It divides vial contents (mg) by water added (mL) to get concentration, then divides your target dose by that concentration to get the injection volume — converted to U-100 syringe units automatically.
Is the calculator really free?
Yes. The reconstitution calculator at My Peptide Protocol is free with no account required.
Does it handle GLP-1 titration schedules?
The app includes dedicated titration tools for semaglutide, tirzepatide, and retatrutide based on published trial schedules.
Why not build the calculator into this site?
The calculator lives in the companion app, where doses can also be logged and tracked against protocols — one tool, one data record.