Planning
What it really costs per injection.
A vial price tells you very little on its own. Cost per dose, and whether the vial survives long enough to use it all, is what decides sustainability.
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The science
The price on the vial is not the cost of the protocol
01
The useful figure is cost per dose, not cost per vial. Divide the vial size by your dose to get the number of full doses, then divide the price by that number. A partial dose left at the end is not a dose, so the count rounds down.
02
Frequency then turns that into a running cost. A dose that looks cheap at forty dollars becomes an eight-hundred-dollar month if you inject five times a week, and the annual figure is usually the one that changes decisions.
03
The constraint people miss is time rather than money. A reconstituted vial keeps roughly four weeks refrigerated, so if your dosing schedule means a vial would take six weeks to finish, part of what you paid for will be discarded regardless of how cheap it looked per milligram.
04
That is why a larger vial is not automatically better value. Per milligram it usually is; per dose actually used it may not be, if you cannot reach the end of it before the clock runs out.
FAQ
Common questions
How do I calculate cost per dose?
Divide the vial size by your dose to get the number of full doses, then divide the vial price by that number. A 10 mg vial at $180 dosed at 2.5 mg gives four doses at $45 each.
Why does the calculator warn about vials lasting over four weeks?
Reconstituted peptides typically keep around 28 days refrigerated. If your schedule means a vial would take longer than that to finish, some of it will expire before you use it.
Does a bigger vial always work out cheaper?
Per milligram, usually. Per dose actually used, not always. A large vial you cannot finish before it expires can cost more in practice than a smaller one you use completely.
Should I include syringes and water in the cost?
For a true picture, yes. This tool covers the vial itself; bacteriostatic water, syringes and alcohol swabs add a small amount to each injection.
How do I compare two vial sizes?
Run the calculation for each and compare cost per dose rather than cost per vial, then check the weeks-to-finish figure against the shelf life. The cheaper vial per milligram is not the better buy if half of it expires.
What if my dose changes over time?
Run it again at the new dose. On a titration schedule the cost per dose falls as the dose rises, because you get fewer doses from the same vial but each one is larger.
VialClock
This page calculates. Your notes app forgets.
Every tool here is stateless by design. What it cannot do is remember that your vial was mixed eleven days ago, or that a step-up is due this week.
Browse all calculatorsThis tool performs arithmetic on figures you enter, or presents a manufacturer-published schedule. It does not know your protocol, will never suggest a dose, and is not medical advice. Dosing decisions belong with a qualified prescriber.