Tool
Peptide cost calculator
How much do peptides cost? There is no single figure, because it depends on the vial price you were quoted, how much peptide is in it, and how often you use it - enter those and this tool gives cost per use, per week, per 30 days, and how many vials a 30-day supply needs. Arithmetic only.
Related:reconstitution & dosage calculator · what peptide therapy costs, with dated prices · storage & shelf life · how to read a COA
Your vial and use
What you actually paid, including shipping if you want it counted.
Printed on the vial label.
The amount you use in a single session - whatever that number is for you.
How many times a week that amount is used - e.g. 7 for once daily, 1 for once weekly.
What it costs
20 uses per vial
- Per week
- $21.00
- Per 30 days
- $90.00
- Vials needed / 30 days(rounded up - you can't buy a fraction of a vial)
- 2
Results update in the address bar, so you can copy the link to save or share a calculation. Nothing is stored, and there is no account.
How the maths works
Four numbers, three divisions and a rounding rule - worth understanding so you can sanity-check the result against your own receipt.
1. Uses per vial
Divide the total peptide in the vial by how much you use per session, both converted to the same unit. A 5 mg (5,000 mcg) vial used at 250 mcg per session gives 20 uses. The result is floored: 5,000 ÷ 300 is 16.67, which is 16 full uses, not 16 and a bit - the leftover in the vial is not a usable dose on its own.
2. Cost per use
Divide the vial price by uses per vial. A $60 vial with 20 uses is $3.00 per use.
3. Cost per week and per 30 days
Cost per week is cost per use times uses per week. The 30-day figure scales uses per week to 30 days (uses per week ÷ 7 × 30) rather than assuming a flat 4 weeks, since 30 days is not an exact multiple of a 7-day week - at 7 uses/week that is 30 uses, not 28.
4. Vials needed per 30 days
Divide 30-day uses by uses per vial, then round up. Needing 1.5 vials for 30 days still means buying 2 - there is no such thing as ordering half a vial.
What actually moves the price
The vial price is one line item, not the whole cost. What you are paying for changes with which supply category a product comes from:
- An FDA-approved peptide drug bundles manufacturing-quality review into its price and is the route with a realistic path to insurance coverage.
- A pharmacy-compounded product adds a consult and prescription fee, but is not FDA-approved, so it is not standard insurance-eligible.
- A "research use only" vial is usually the lowest listed price because it skips the consult, lab work and manufacturing review the other two routes are paying for.
The full breakdown, including what a consult and lab work actually cover, is on what peptide therapy costs, with dated prices.
Common questions
How is cost per use calculated?
Price per vial divided by how many full uses the vial provides. Uses per vial is the total peptide in the vial divided by the amount used per session, rounded down - a partial use left in the vial is not a usable dose, so it is not counted.
How is the 30-day cost worked out?
Uses per week is scaled to 30 days (uses per week ÷ 7 × 30) rather than assumed to be a flat 4 weeks, since 30 days is not an exact multiple of 7. That number of uses is then multiplied by the cost per use.
Why does "vials per 30 days" round up?
Because you cannot buy or open a fraction of a vial. If 30 days of use needs 1.5 vials, you need 2 - the extra half-vial either goes unused or carries into the next period, but the purchase itself is a whole number.
Does this tool tell me how much to use or how often?
No. It only does arithmetic on the price, vial size, amount per use, and frequency you enter. It does not know what compound you have or what amount or schedule is appropriate - see the calculator on this page for reconstitution and syringe-unit conversion, but the dose and schedule are between you and the numbers you already have.
Do I need a prescription to buy peptides?
For an FDA-approved peptide medicine, yes - it is dispensed by a pharmacy against a prescription. For a "research use only" vial, there is no approved drug to write a lawful prescription for in the first place, because compounded and research-labelled products are not FDA-approved. A seller asking you to complete a "prescription" step before shipping an unapproved vial does not make that vial an approved, prescribed medicine.
Are peptides actually worth it?
That depends on what you are comparing and what you are paying for, not just the number on the vial. The price of an FDA-approved drug, a compounded product and a research chemical each covers a different set of things - manufacturing review, a prescriber and pharmacy, or none of that - so a lower cost per use on one is not automatically a better deal than a higher one on another. See what peptide therapy costs, with dated prices, for the category-by-category breakdown.
Is there a downside to a cheaper peptide source?
The main one is what the lower price has not paid for. A cash-only research-chemical vial is typically the cheapest line item precisely because it skips a clinical consult, baseline and follow-up lab work, and manufacturing quality review - costs a prescribed route bundles in. That is a real trade-off in what is checked, not only a discount.
What are the top 3 peptides to take?
There is no evidence-based ranking of peptides overall. Approved medicines such as semaglutide and tirzepatide have trial evidence for specific, tested indications, while most other peptides sold as research chemicals have no such evidence and no approved use. Which one, if any, is relevant depends on the specific health question, not a top-3 list - see the individual compound pages on this site for the evidence behind each one.
How long does a peptide shot last?
There is no single figure - how long an injection's effect lasts is specific to the peptide, and for most research chemicals it is not established at all. For an FDA-approved peptide medicine, the dosing interval is set on the drug label. That is also a different question from how long a reconstituted vial itself stays usable, which is covered on storage & shelf life.
Does Jennifer Aniston inject peptides?
This site does not report on what any named individual takes or has done, and cannot verify claims about a specific person's use of any substance. Peptides that come up in celebrity health coverage are usually either an FDA-approved GLP-1 medicine such as semaglutide or tirzepatide, prescribed for an approved indication, or an unapproved research chemical marketed for skin or ageing with no such approval. See the individual compound pages on this site for what is actually established about each one.