# Peptide Reconstitution Calculator — mg, mL & syringe units done right

> Free GLP-1 & peptide reconstitution calculator: enter vial mg, bac water and target dose to get exact syringe units, mL, doses per vial and cost per dose.

Source: https://glp-1-app.com/

Free · no account · no app needed

## Reconstitution calculator that gets the units right

Enter your vial strength, the bac water you added, and your target dose. Get the exact **syringe units**, mL, doses per vial, and cost per dose — with guardrails that catch the mistakes other calculators miss.

GLP-1 (Ozempic/Wegovy molecule; also compounded).

"Units" are a volume marking, not a drug amount — the same units = a different mg every time the vial is mixed differently.

Log shots, track doses per vial and expiry, and plan your taper — private by design.

### Why "just use 30 units" is wrong

Syringe "units" are a _volume_ marking — on a U-100 syringe, 100 units = 1 mL. They say nothing about how much drug you're drawing until you know the concentration, and the concentration depends entirely on how the vial was reconstituted (mg of powder ÷ mL of bac water). The same "30 units" can be a wildly different mg dose from one mix to the next. This calculator converts mg ↔ mL ↔ units correctly, both directions.

### Calculators by peptide & brand

### Learn

### Sources

This tool converts the numbers you enter — it never recommends a dose. Its constants are cited below; the warnings are arithmetic checks, not clinical limits.

- Syringe "units" are a volume marking, not a drug amount: a U-100 syringe reads 100 units = 1 mL (U-40 = 40 units/mL). The calculator converts mg ↔ mL ↔ units on this standard — it never assumes units equal mg.[Standard insulin concentration, U-100 = 100 units/mL (PMC5505430) ↗](https://pmc.ncbi.nlm.nih.gov/articles/PMC5505430/)
- The volume to draw is (drug ordered ÷ drug available) × the vial's total mL — i.e. dose ÷ concentration, where concentration (mg/mL) = vial mg ÷ bacteriostatic water mL. You enter every number; the tool only does this arithmetic.[Dose-volume formula — StatPearls "Dose Calculation" (Bookshelf NBK430836) ↗](https://www.ncbi.nlm.nih.gov/books/NBK430836/)
- An opened (punctured) multi-dose vial is dated and discarded within 28 days unless the manufacturer states otherwise.[CDC Injection Safety (per USP General Chapter ) ↗](https://www.cdc.gov/injection-safety/hcp/clinical-safety/index.html)

Educational calculator only. Not medical advice, not a recommended dose, and not a substitute for your prescriber or pharmacist — you enter your own numbers and we only do the arithmetic. Some peptides shown are not approved for human use; verify your product and dose with a licensed clinician.

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