Peptide Reconstitution Calculator
Accurate peptide reconstitution calculations are fundamental to reliable research. This guide provides the formulas, reference tables, and step-by-step instructions to calculate exact concentrations for any peptide vial size.
The Basic Formula
Concentration (mcg/mL) = Total Peptide (mcg) ÷ Volume of BAC Water (mL)
For example: A 5mg vial contains 5,000mcg. Adding 2mL of bacteriostatic water gives: 5,000 ÷ 2 = 2,500mcg/mL.
Insulin Syringe Conversion
Standard U-100 insulin syringes hold 1mL total, with markings in “units” (IU). 100 units = 1mL. Therefore: 10 units = 0.1mL, 20 units = 0.2mL, and so on. To find mcg per unit mark: divide your concentration by 100.
Quick Reference Tables
5mg Vial: With 1mL BAC water = 50mcg per unit. With 2mL = 25mcg per unit. With 2.5mL = 20mcg per unit.
10mg Vial: With 1mL BAC water = 100mcg per unit. With 2mL = 50mcg per unit. With 5mL = 20mcg per unit.
15mg Vial: With 1mL BAC water = 150mcg per unit. With 2mL = 75mcg per unit. With 3mL = 50mcg per unit.
Choosing the Right Volume
Select your BAC water volume based on your typical research dose. The goal is to make measuring easy and accurate. If your typical dose is 250mcg from a 5mg vial, using 2mL gives exactly 10 units per dose — clean and easy to measure.
Dose Calculation Examples
Example 1: You have BPC-157 5mg and want 250mcg doses. Add 2mL BAC water ? 2,500mcg/mL ? draw 10 units per dose ? 20 doses per vial.
Example 2: You have semaglutide 5mg and want 500mcg doses. Add 2mL BAC water ? 2,500mcg/mL ? draw 20 units per dose ? 10 doses per vial.
Avoiding Measurement Errors
Always draw slowly and check the syringe at eye level. Air bubbles can cause inaccurate measurements — tap the syringe gently to move bubbles to the top before measuring. Use a fresh needle for each draw to maintain sterility.
Related Articles: How to Mix Peptides | How to Reconstitute Peptides | How Much BAC Water to Add
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