Example calculation
A 5 mg vial mixed with 2 mL gives 2.5 mg/mL, which is the same as 2,500 mcg/mL.
What this calculator solves
Concentration is the bridge between the vial label and the syringe. Divide the total amount of peptide by the liquid volume to find how much peptide is in each mL.
After concentration is known, dose calculators can convert a target amount into mL and syringe units.
- Concentration = vial amount / diluent volume
- 5 mg / 2 mL = 2.5 mg/mL
- 2.5 mg/mL = 2,500 mcg/mL
Why concentration changes with water volume
Adding more water does not change the total peptide in the vial. It spreads the same amount across more liquid, lowering concentration and increasing the draw volume needed for the same target dose.
Sources used
Frequently asked questions
Is concentration the same as dose?+
No. Concentration is the vial strength after mixing. Dose is the amount you intend to draw from that vial.
Why show both mg/mL and mcg/mL?+
Vials are often labelled in mg, while target doses are often written in mcg. Showing both reduces conversion mistakes.
What should I do after calculating concentration?+
Use the concentration with a dose calculator or peptide-specific calculator to convert a target dose into mL and syringe units.