GLP-1 monthly cost calculator
Ellis Brandt built this site’s grading methodology and maintains it. Last re-read September 2026.
A GLP-1 seller quotes you a number. Whether that number is per calendar month, per four weeks, per shipment or the whole of a prepay term changes what it costs you, and the four are not interchangeable. Put your own figure in and read it back on a calendar month.
Nothing on this page is paid and nothing on it links to a seller. It holds no prices of its own: every number below is yours.
Restated as a standing monthly rate
$379.38
$349.00 × 30.44 days ÷ 28 days
| per day of supply$349.00 ÷ 28 days | $12.46 |
|---|---|
| over a year at that rate$349.00 × 365.25 days ÷ 28 days | $4,552.58 |
Your figure buys 28 days of supply. Restated over an average calendar month of 30.44 days that is $379.38 — more than the number you were quoted, because a 4 weeks and a calendar month are not the same length. This converts what the figure BUYS. It says nothing about when you are charged, or whether you can stop.
Why the term matters more than it looks like it does
Four weeks is 28 days. An average calendar month is 30.44 days. A figure quoted per four weeks therefore buys about 8.7% less time than the same figure quoted per month, so it costs about 8.7% more to stay on. That gap is larger than the gap between many of the figures this site publishes, which is the reason it is worth a page.
The same problem arrives in a different costume with a shipment. A plan that ships every eight weeks and charges on despatch is charged six or seven times a year, not twelve, and a plan sold as a three- or six-month total is a single number covering a length of supply you have to divide out before it means anything.
It is not an obscure problem. Of the 60 sellers on this site that publish a comparable figure before an intake, every one of them was read as charging on a calendar month — and they wrote that one cycle 22 different ways across those 60 figures, from a bare slash-mo to “Billed monthly · no commitment”. This site restates all of them as “per month” so a reader can set them side by side. If your own quote uses a different term, that restatement is the arithmetic above, and you have to do it before any comparison means anything.
What this calculator does not tell you
It does not tell you when your card is charged. A term is not a billing cycle: a figure that buys twelve weeks of supply can be billed once up front, monthly against a commitment, or on despatch, and the arithmetic above cannot tell which. It converts the price, not the contract.
It does not tell you whether two restated figures are comparable. Two standing monthly rates are still not the same offer if one holds at every dose and the other prices a single rung of a ladder, and what a published price actually buys, by dose is the page that counts how often each of those is true on this roster.
It does not name a cheapest, and neither does any board on this site. It restates one number that you supplied. There is no ranking in it and there is nothing here to buy.
Why this page carries no advertising
A calculator sitting beside a button that pays the person who built it is not a calculator. Every other content page here carries links to sellers, and those links are how the site is funded — the disclosure explains exactly what that means. This page and anything else under /tools/ is kept clean of all of it so that the pages which do carry links can be believed, and that is enforced by a build guard rather than by good intentions: the build fails if a seller link, a call to action or a seller’s name appears anywhere on a tools route.