Vial mass, BAC water, target dose in — exact draw on a U-40, U-50, or U-100 insulin syringe out. Works for BPC-157, TB-500, retatrutide, semaglutide, tirzepatide, and any other lyophilized peptide.
The total peptide in the vial. Read it off the label — usually 5 mg or 10 mg for research peptides, or the dose ladder for GLP-1s.
Example: 10 mg vial.
How much bacteriostatic water you reconstituted into the vial. Common choices are 1 mL, 2 mL, or 3 mL depending on how concentrated you want the solution.
Example: 2.0 mL BAC water.
The dose you intend to draw, in micrograms (mcg). The calculator handles the mg ↔ mcg conversion internally.
Example: 250 mcg target dose.
The calculator shows the exact syringe units to draw — for our worked example, 5.0 units on a U-100 syringe (= 0.050 mL). It also derives the concentration, volume per dose, and doses-per-vial so you can budget vials per cycle.
Result: 5.0 u · 0.050 mL · 40 doses per vial · 5,000 mcg/mL concentration.
Yes. No account, no email, no payment. The calculator runs entirely in your browser and stores nothing — refresh the page and your inputs are gone.
Concentration = vial mass × 1,000 ÷ BAC water (mcg/mL). Volume per dose = target dose ÷ concentration (mL). Syringe units = volume per dose × 100 for a U-100 syringe (× 50 for U-50, × 40 for U-40). Doses per vial = total mcg ÷ target dose. Everything is derived live as you type.
Bacteriostatic water — sterile water with 0.9% benzyl alcohol added. It's the diluent used to reconstitute lyophilized peptides because the benzyl alcohol prevents bacterial growth over multi-dose vial use. Sold by the 30 mL bottle. Plain sterile water is also used but doesn't preserve.
The number is the unit scale per 1 mL. A U-100 syringe has 100 graduations per 1 mL (10 u = 0.1 mL). A U-50 has 50 graduations per 0.5 mL. A U-40 has 40 graduations per 1 mL (older / veterinary standard). The calculator supports all three; switch the syringe type and the unit reading updates.
No. The calculator does the math on the numbers you enter — nothing more. It will not tell you what dose to take, what compound to use, or how often. Dose decisions are between you and your clinician.
Not in the public calculator — it's stateless by design. Inside the PepMe app, your stack stores compounds + doses + vial concentrations, so the same math is precomputed and you only need to glance at the syringe-fill preview.
Yes. The math is the same regardless of compound — vial mass + BAC water + target dose → exact draw. For FDA-approved GLP-1s prescribed by a clinician, follow the prescribed dosing on the label; the calculator just does the volumetric arithmetic.
Vial mass in milligrams (mg), BAC water volume in millilitres (mL), target dose in micrograms (mcg). The calculator handles all the unit conversions (1 mg = 1,000 mcg, 1 mL = 100 units on a U-100 syringe) internally.