How do I calculate peptide doses in insulin units?

Divide the dose in mcg by the concentration in mcg per mL, then multiply by 100 for a U-100 syringe. A 10 mg vial in 2 mL bac water gives 5000 mcg/mL, so 250 mcg equals 0.05 mL or 5 units on U-100.

Does the peptide identity change the reconstitution math?

No. Reconstitution depends only on vial mass, diluent volume, target dose and syringe scale. Peptide identity affects clinical dose ranges, not the volumetric calculation.

Is bacteriostatic water the same as sterile water?

No. Bacteriostatic water contains 0.9% benzyl alcohol allowing multi-use vials up to 28 days. Sterile water is single-use.

Free tool

Peptide Reconstitution Calculator

Convert vial size, bacteriostatic water volume, and target dose into exact insulin syringe units. Works for any lyophilized peptide, the math is identical regardless of compound. For laboratory research only.

Vial size (mg)

Bac water (mL)

Target dose (mcg)

Enter any dose in micrograms. For mg, multiply by 1000 (e.g. 2.5 mg = 2500 mcg).

Syringe

Frequency

Need dose ranges per compound? See the Peptide Hub or the cheat sheet PDF.

Draw on syringe

5.0units

= 0.050 mL on U-100 1mL

Concentration5.00 mg/mL

Doses per vial40 × 250 mcg

Vial duration (once daily)~40 days

Join PX Rewards

Create free account

Full reconstitution guide

Step-by-step protocol, sterile technique, storage windows.

How the calculation works

A lyophilized peptide vial contains a fixed mass in milligrams. When you add bacteriostatic water, that mass dissolves into a liquid concentration in mcg per mL. Dose in mcg divided by concentration gives draw volume in mL. Multiplying mL by 100 converts to units on a standard U-100 insulin syringe. The peptide identity does not enter this calculation, only mass, volume and dose.

For laboratory research use only. Not for human consumption, veterinary use, food additive, or cosmetic application. Always verify your calculation against an independent source before reconstituting any compound.

Peptide Reconstitution Calculator

How the calculation works

Welcome to PX Rewards