Enter your research vial size, the bacteriostatic water you're adding, and the amount you want to measure — get the exact concentration and syringe units instantly. A laboratory measurement tool, not dosing guidance.
All fields update the results live. Presets are common research vial sizes — enter any custom value in the box.
Every result comes from three simple steps — no magic:
Divide the peptide in the vial by the water you added.
concentration (mg/mL) = vial mg ÷ water mL
Example: 5 mg ÷ 2 mL = 2.5 mg/mL (2,500 mcg/mL).
Divide the amount you want by the concentration.
volume (mL) = target mcg ÷ concentration (mcg/mL)
Example: 250 mcg ÷ 2,500 mcg/mL = 0.10 mL.
On a U-100 insulin syringe, 1 unit = 0.01 mL, so multiply volume by 100.
units = volume (mL) × 100
Example: 0.10 mL × 100 = 10 units.
Bacteriostatic water is sterile water with 0.9% benzyl alcohol added to inhibit bacterial growth, which is why it's the standard diluent for reconstituting research peptides in a lab setting. The amount you add sets your concentration — more water means a lower concentration per unit.
Research peptide volumes are tiny — often a fraction of a milliliter — so U-100 insulin syringes (marked in units, where 100 units = 1 mL) give far more precise, readable measurements than a standard mL syringe.
No. This is a measurement/dilution calculator only. It converts numbers you enter into a concentration and a corresponding volume. It does not recommend an amount, and nothing on this site is medical advice. All compounds referenced are strictly for laboratory and research use — not for human consumption.
See our independent, COA-focused vendor rankings — we score every research-peptide company on purity, third-party Certificates of Analysis, reputation, and shipping.