Work out how many full doses a vial holds, how many weeks it will last at your dose and frequency, and (optionally) what each dose costs. Works for any compound measured in milligrams.
Reviewed for accuracy · Last reviewed July 8, 2026Doses per vial is the vial size divided by the dose, rounded down to full doses: a 10 mg vial at 2.5 mg per injection holds 4 doses, and any remainder smaller than a full dose is left out. Weeks per vial is doses divided by injections per week. Cost per dose is the vial price divided by the doses it holds, and the monthly figure assumes an average month of about 4.35 weeks.
One practical limit to keep in mind: a reconstituted vial does not keep forever. Mixes with bacteriostatic water are commonly used within about 28 days refrigerated, so a vial that lasts longer than a month on paper may hit its use window first. To get the concentration and syringe draw for your mix, use the reconstitution calculator. If your dose is still stepping up, the titration schedule planner shows when it changes, which also changes how long each vial lasts.
This tool is an independent educational reference and is not medical advice. Talk to a doctor before starting or adjusting any compound.