Peptide Calculator
Calculate reconstitution concentration, injection volume, and total doses per vial
For research purposes only. Not medical advice.
Reconstitution
How much bacteriostatic water will you add to your vial?
Concentration
500mcg per 0.1ml
5.00 mg/ml
Dosage
How much do you want to inject per dose?
Injection volume
0.050ml
5.0 units on a 100-unit syringe
Syringe units
5.0units
on a 1ml / 100-unit syringe
Doses per vial
40doses
at 250 mcg per dose
Find peptides that match your calculation:
Browse PeptidesHow to Use This Calculator▼
- 1Enter the total peptide amount shown on your vial label (e.g., 10mg BPC-157)
- 2Enter how much bacteriostatic water you plan to add (common amounts: 1ml, 2ml, 3ml)
- 3Enter your desired dose per injection in micrograms (mcg)
- 4Read your results — the calculator shows exactly how much to draw in your syringe
Tip: More water = lower concentration = easier to measure small doses accurately. Less water = higher concentration = fewer injections per vial.
About Our Peptide Reconstitution Calculator
Our free peptide mixing calculator helps researchers determine the correct reconstitution concentration, dilution ratio, and injection volume for common research peptides including BPC-157, TB-500, Retatrutide, Tirzepatide, CJC-1295, and Ipamorelin. Enter your vial size, the amount of bacteriostatic water you plan to add, and your desired dose — the calculator instantly shows your concentration in mcg/0.1ml, the exact injection volume in millilitres, syringe units on a standard 100-unit insulin syringe, and total doses per vial. Works for any peptide amount from 1mg to 100mg vials.
For research purposes only. This tool does not provide medical advice.
Frequently Asked Questions
How do I use a peptide reconstitution calculator?
Enter the peptide amount in your vial (e.g. 5mg or 10mg), the volume of bacteriostatic water you plan to add, and your desired dose. The calculator instantly shows the concentration, exact injection volume in millilitres and syringe units, and how many doses you can get per vial.
What is bacteriostatic water and why is it used for peptides?
Bacteriostatic water (BAC water) is sterile water containing 0.9% benzyl alcohol as a preservative. It prevents bacterial growth after the vial is opened, making it the standard solvent for reconstituting lyophilized (freeze-dried) peptides in research settings.
How do I convert mg to mcg for peptide dosing?
1 mg = 1,000 mcg. To convert milligrams to micrograms, multiply by 1,000. For example, a 250 mcg dose is 0.25 mg. Our calculator handles this conversion automatically when you enter your desired dose.
What size syringe should I use for peptide injections?
A standard 100-unit (1 mL) insulin syringe is most commonly used in peptide research. Our calculator displays results in both millilitres and insulin syringe units for convenience. For very small volumes, a 0.5 mL (50-unit) syringe provides greater precision.
How many doses can I get from a 10mg peptide vial?
It depends on your dose size and reconstitution volume. For example, a 10mg vial reconstituted with 2 mL of bacteriostatic water at a 250 mcg dose yields 40 doses. Use the calculator above to determine the exact number for your specific setup.
For research purposes only. Not for human consumption.