This peptide calculator takes three inputs: the amount of lyophilized peptide in the vial (mg), the volume of bacteriostatic water added (mL), and the amount you want per draw (mcg). Concentration is mass divided by volume. It then applies three steps:
The arithmetic matches the concentration section of the peptide reconstitution protocol. That protocol covers sterile diluent, mixing, labeling, and storage; this page only converts the numbers you enter. Terms such as bacteriostatic water, lyophilized peptide, and U-100 syringe units are defined in the peptide research glossary.
Milligrams (mg) and micrograms (mcg) are mass. 1 mg equals 1,000 mcg. Syringe units on this page are U-100 graduations: 100 units = 1 mL, so 1 unit = 0.01 mL. IU (international units) measure biological activity, not mass. This calculator does not convert IU to mg or mcg because that factor is peptide-specific and is not stored here. Enter mass in mg or mcg.
A 5 mg vial reconstituted with 2 mL of bacteriostatic water gives 2,500 mcg/mL, which is 25 mcg per unit on a U-100 syringe. Entering 250 mcg as the target amount is therefore 10 units, or 0.10 mL. The numbers are an arithmetic example, not a recommended amount.
Units are the graduations on a U-100 insulin syringe: 100 units equal 1 mL, so 1 unit equals 0.01 mL. The calculator assumes a U-100 syringe; U-40 or U-50 syringes are graduated differently and need different math.
No. The total peptide in the vial is fixed. More water lowers the concentration, so each unit contains less peptide and more units are needed for the same amount. Less water does the opposite.
1 mg equals 1,000 mcg. A 5 mg vial therefore contains 5,000 mcg of peptide.
No. IU (international units) measure biological activity, not mass. The IU-to-mg factor is peptide-specific and is not stored here, so enter mass in mg or mcg.
It converts the vial amount, water volume, and target amount you enter into concentration and U-100 syringe units. That is unit conversion, not a dosing recommendation.
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol as a preservative. It is commonly used to reconstitute lyophilized (freeze-dried) peptides in laboratory settings.
No. It only converts the amounts you enter into concentration, syringe units and volume. Preset values are examples, not recommendations. All products listed on BestPeptide.info are discussed for research use only.
No. Reconstitution is the laboratory procedure of dissolving lyophilized peptide in a sterile diluent. This calculator only converts vial amount, water volume, and a target amount into concentration and U-100 syringe units. The peptide reconstitution protocol covers the procedure; the glossary defines the terms.
The selector includes every published peptide in the encyclopedia. Vial-size examples are included only for BPC-157, TB-500, Semaglutide, Tirzepatide and CJC-1295. Other peptides prefill the name; enter vial amount and water volume from the vial. Open a peptide page for its category overview, or compare peptide stores by COA availability, shipping and payment options.
For research and informational purposes only. This tool performs unit conversion and does not provide medical advice or dosing recommendations.
For research and informational purposes only. This is unit conversion, not a dosing recommendation. Validate calculations independently. See the reconstitution protocol and glossary.
Your brand here — Reach our audience of peptide researchers and boost your sales.