A general-purpose concentration and volume reference — enter any vial size and diluent volume to work the math yourself. Looking for a specific compound's typical values instead? Browse the Peptide Index.
Concentration is peptide mass divided by diluent volume: mg ÷ mL = mg/mL. Once concentration is known, the volume needed to isolate any given amount is that amount divided by the concentration. This is standard dilution arithmetic — the same relationship used across laboratory chemistry whenever a solid is dissolved into a liquid carrier.
Syringe unit markings (the U-100 standard shown here) are just a volume scale: 100 units equal 1 mL, so 10 units equal 0.1 mL, and so on. Reading a draw in "units" is a convenience for reading small volumes precisely, not a different quantity.
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The Vial Index performs concentration and volume arithmetic only. It does not provide medical, dosing, administration, or clinical guidance of any kind, and nothing on this page should be interpreted as a recommendation for human or animal use. This tool is intended for laboratory research education — understanding solution chemistry and standard dilution math — and for researchers working with materials that are for in-vitro laboratory research use only.