Free tool
Peptide Dosage Calculator
Reconstitution & Syringe Unit Calculator for Research Peptides
Enter your vial size, bacteriostatic water volume, and target dose — get the exact insulin-syringe units to draw, instant.
Research use only. This calculator is for educational and laboratory reference. It is not medical advice and the values are not for human consumption.
- Concentration
- 2.5 mg/mL
- mcg per unit
- 25 mcg
- Doses per vial
- 20
- Desired dose
- 250 mcg
Frequently Asked Questions
How many units is 250 mcg of a 5 mg vial reconstituted with 2 mL of bacteriostatic water?
Concentration is 5 mg ÷ 2 mL = 2.5 mg/mL. 250 mcg = 0.10 mL. On a 1 mL (100-unit) insulin syringe, that is 10 units.
How much bacteriostatic water should I add to a 5 mg peptide vial?
Most researchers use 1 mL to 3 mL. 2 mL is a common middle ground that produces clean syringe-unit numbers for typical 250–500 mcg doses.
How do I convert mL to insulin syringe units?
A standard U-100 insulin syringe is 1 mL = 100 units. So 0.10 mL = 10 units, 0.25 mL = 25 units, and so on.
What is the formula for weight-based peptide dosing?
Desired dose (mcg) = body weight (kg) × dose per kg (mcg/kg). Then divide that desired dose by the concentration (mcg/mL) to get the volume to draw, and multiply by 100 to get insulin-syringe units.