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PeptideScholar

Peptide Reconstitution Calculator

Calculate how much bacteriostatic water to add and how many units to draw on your syringe. Free, instant, no signup.

Peptide Reconstitution Calculator

Calculate exact volumes and syringe units for any peptide vial

Total mg in your vial (check the label)

Amount of BAC water you will add to the vial

How much peptide per injection

Enter values on the left to see your results

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

How to Use This Calculator

1

Enter Peptide Amount

Find the total mg on your vial label (e.g. 5mg, 10mg) and enter it.

2

Enter Water Volume

Choose how much bacteriostatic water you will add to reconstitute the vial.

3

Enter Desired Dose

Enter the dose you want per injection in mcg or mg and select the unit.

4

Read Your Results

The calculator instantly shows 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 (BAC water) into a syringe. Insert the needle into the rubber stopper of the peptide vial, angling toward the glass wall. Slowly inject the water, letting it run down the side of the vial. Do not shake — gently swirl or let it sit until fully dissolved.
What does 'units' mean on an insulin syringe?
Insulin syringes are calibrated in 'units' where 100 units equals 1 mL. So 10 units = 0.1 mL, 50 units = 0.5 mL, etc. This is the U-100 standard used worldwide for insulin and 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 means a more dilute solution (lower concentration), so you draw a larger volume per dose. Less water means a more concentrated solution and a smaller volume per dose. The dose in mcg or mg stays the same.
How long does reconstituted peptide last?
Most reconstituted peptides should be used within 3-4 weeks when stored in the refrigerator (2-8 C / 36-46 F). Never freeze reconstituted peptides. Bacteriostatic water contains a preservative (benzyl alcohol) that helps prevent bacterial growth. Always check the specific peptide's storage instructions.

Medical Disclaimer

This content is for informational and educational purposes only and does not constitute medical advice, diagnosis, or treatment recommendations.

Always consult a qualified healthcare provider before starting, stopping, or modifying any treatment. Do not disregard professional medical advice based on information found on this site.

No claims of therapeutic efficacy are made for substances that are not FDA-approved for the discussed indications. Research citations reflect published findings and do not imply endorsement.