Peptide Reconstitution Calculator

Calculate how much bacteriostatic water to add and how many units to draw on your syringe. The calculator stays the primary tool, and the surrounding guidance now uses the same page shell as the rest of the reference site.

Peptide Reconstitution Calculator

Calculate exact volumes and syringe units for any peptide vial.

Total mg in your vial.

Amount of BAC water added to the vial.

How much peptide per injection.

Enter values to see your results.

For educational purposes only. Always verify calculations with a healthcare provider.

How to Use This Calculator

1

Enter peptide amount

Use the total milligrams printed on the vial label.

2

Enter water volume

Choose the amount of bacteriostatic water added during reconstitution.

3

Enter desired dose

Add the dose per injection and switch between mcg and mg as needed.

4

Read the result

The calculator returns concentration, syringe units, and doses per vial.

Common Reconstitution Examples

BPC-157

Standard healing protocol

Vial
5mg
BAC Water
2mL
Dose
250mcg
Draw
10 units

Semaglutide

Starting dose for weight management

Vial
2mg
BAC Water
1mL
Dose
0.25mg
Draw
12.5 units

Ipamorelin

Common growth hormone secretagogue dose

Vial
5mg
BAC Water
2.5mL
Dose
200mcg
Draw
10 units

Frequently Asked Questions

How do I reconstitute a peptide vial?
Draw your desired amount of bacteriostatic water into a syringe. Insert the needle into the rubber stopper, angle toward the glass wall, and slowly inject the water down the side of the vial. Do not shake the vial. Let it dissolve or swirl gently.
What does 'units' mean on an insulin syringe?
Insulin syringes are calibrated in units where 100 units equals 1mL. That means 10 units is 0.1mL and 50 units is 0.5mL. This is the U-100 standard commonly used for peptide injections.
Does the amount of water change the potency?
No. The total peptide in the vial stays the same regardless of how much water you add. More water makes the solution more dilute, so you draw more volume per dose. Less water makes the solution more concentrated, so you draw less volume per dose.
How long does reconstituted peptide last?
Most reconstituted peptides should be used within 3 to 4 weeks when stored in the refrigerator at 2 to 8C or 36 to 46F. Do not freeze reconstituted peptides, and always check the specific storage guidance for the compound you are using.