PRACTICAL TOOL
Peptide Dosing Calculator
Calculate reconstitution ratios and injection volumes. Enter your vial size, water volume, and desired dose to get the exact amount to draw.
Quick presets
Total peptide in the vial
Water added to reconstitute
Per injection
Result
2500
mcg per mL
0.100
mL per injection
10.0
units (insulin syringe)
20
doses per vial
With a 5000 mcg vial reconstituted in 2 mL of bacteriostatic water, each 250 mcg dose requires drawing 0.100 mL (10.0 units on an insulin syringe). This vial provides 20 doses.
This calculator is for educational reference only.
Always verify calculations with your prescribing physician or pharmacist. Dosing varies by individual, condition, and compound. Use bacteriostatic water (not sterile water) for multi-dose vials. Refrigerate after reconstitution. Use within 28 days.
How Reconstitution Works
Peptides are typically sold as a lyophilized (freeze-dried) powder in a vial. Before use, the powder must be reconstituted by adding bacteriostatic water. The amount of water you add determines the concentration — and therefore how much liquid you need to draw for each dose.
Concentration = Vial Size (mcg) ÷ Water Added (mL)
Injection Volume = Desired Dose (mcg) ÷ Concentration (mcg/mL)
Syringe Units = Injection Volume (mL) × 100
Example: A 5,000 mcg (5 mg) vial of BPC-157 reconstituted with 2 mL of bacteriostatic water gives a concentration of 2,500 mcg/mL. For a 250 mcg dose, you would draw 0.1 mL (10 units on an insulin syringe).