Five numbers, and two of them are optional
Nothing is saved and nothing leaves your browser. Change any number and everything below updates.
What is in the vial
How you are using it
Money and timing optional
One division, then a calendar
Doses come before days
The vial holds a fixed amount of peptide. Divide it by the dose and you get whole doses, with whatever will not make a full dose left in the bottom. Everything else on this page is that one number spread across a calendar.
Frequency turns doses into a date
Twenty doses is three weeks at once a day and five months at once a week. The same vial, the same money, two completely different reorder decisions.
Cost per dose beats cost per vial
A cheaper vial that gives fewer doses is not cheaper. Dividing the price by the doses you actually get is the only number worth comparing between vendors.
Why does it round down?
Because a partial dose is not a dose. If the arithmetic says 20.7 doses, you get 20 and a leftover. Rounding up would tell you the vial lasts a day longer than it does, and that is the direction that leaves you short.
Does the water I add change how long the vial lasts?
No. The number of doses depends on how much peptide is in the vial and how much you take each time. Water changes the size of the draw, not the amount of peptide. Use the calculator for the mix and this page for the supply.
Why is there a warning when a vial lasts more than two months?
Days of supply counts the powder, which is stable for a long time. Once water goes in, the clock is different, and for many peptides nobody has published a stability study that says how long a mixed vial holds up. A long supply on paper is not permission to keep using one vial for months.
Why does it tell me to reorder a week early?
Shipping, payment holds and restocks all take time, and running out mid protocol is the common way people end up buying from whoever can ship fastest rather than whoever they trust. Seven days is a plain buffer, not a rule.
What is the leftover warning about?
If your dose does not divide evenly into the vial you end up with a partial dose stuck in the bottom. A small remainder is normal. When it is more than half a dose it usually means a different vial size would waste less money.
Does this tell me how much to take?
No. It does arithmetic on the numbers you enter. It has no view on whether a dose, a frequency or a compound is right for you.
Mix a vial and see the exact syringe mark for the dose you planned here.
Compare vendor prices once they are normalised to the same unit.
What the fridge does, what it does not, and how long a mixed vial really has.
Coring, stopper wear, and why dose count and puncture count are the same number.