Free Tool
Peptide Cost Calculator
Enter a vial price, vial size, dose, and frequency to break down cost per dose and projected monthly and yearly spend. A budgeting estimate, not medical advice or a price quote.
Enter price, size, dose + frequency, then Calculate.
How the math works — a worked example
Cost per mg
$200 vial ÷ 10 mg = $20 / mg
Cost per dose
$20/mg × 0.5 mg = $10 / dose
Monthly (weekly dose)
$10 × 1 × 52 ÷ 12 ≈ $43 / month
Yearly (weekly dose)
$10 × 1 × 52 ≈ $520 / year
Cost per mg is the vial price divided by the vial size in mg, which lets you compare vials of different sizes on the same basis. Cost per dose multiplies that price per mg by your dose. Weekly and yearly figures simply multiply cost per dose by how many doses you take each week (×52 for the year).
Monthly cost uses 52 ÷ 12 ≈ 4.33 weeks per month rather than a flat 4 weeks. A 4-week month would undercount, since 12 four-week months is only 48 weeks. Using the true average of 4.33 weeks keeps the monthly estimate consistent with the yearly total. These are best-case estimates that assume no wasted or partial doses — actual pricing varies by pharmacy, supplier, insurance, and region.
Related tools: Vial Duration Calculator · Dosing Calculator · All tools
Frequently asked questions
How do you calculate cost per dose?
Cost per dose is the price per mg multiplied by your dose in mg. Divide the vial price by the vial size to get the price per mg, then multiply by the dose. For example, a $200 vial of 10 mg costs $20/mg, so a 0.5 mg dose is about $10. This is a budgeting estimate only — confirm pricing and dosing with your prescriber and pharmacy.
How is the monthly cost estimated?
Monthly cost uses the average month length of 52 weeks ÷ 12 ≈ 4.33 weeks per month, so monthly cost = cost per dose × doses per week × 52 ÷ 12. Using 4.33 instead of 4 avoids underestimating annual spend. Actual billing cycles and pharmacy pricing vary.
What does cost per mg tell me?
Cost per mg (vial price ÷ vial size in mg) lets you compare value across vials of different sizes and prices on an apples-to-apples basis. A larger vial often has a lower cost per mg, but only matters if you can use it before it expires. This is an estimate for budgeting, not medical advice.
How do I estimate semaglutide or GLP-1 cost per month?
Enter your vial price and vial size in mg, your weekly dose, and a weekly frequency. The calculator returns cost per dose and projected monthly and yearly spend. GLP-1 dosing is typically titrated up over time, so re-run the numbers at each dose level. Always follow your clinician's prescribed schedule.
Does this account for wasted or partial doses?
No — this calculator assumes you use every mg in the vial. Drawing partial final doses, dead-space loss in the syringe, or discarding expired product will raise your real cost per dose. Treat the result as a best-case budgeting estimate.
Is this medical or pricing advice?
No. This is a general budgeting estimate, not medical advice and not a price quote. Real-world pricing varies by pharmacy, supplier, insurance, and region, and dosing must be directed by your prescriber. Use it as context, then verify with your clinician and pharmacy.
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