Reverse calculator
Determine the optimal bacteriostatic water volume from your target syringe units and vial mass. Works backwards from your desired draw to calculate water needed.
Reverse calculator
mg
mcg
units
Optimal water volume
- mL
Resulting concentration
- mg/mL
How it works
1
Enter vial mass
Enter the total peptide mass of your current vial (mg).
2
Set target dose
Specify your ideal administered dosage (mcg).
3
Choose syringe
Select the volumetric capacity of your syringe.
4
Set target units
Input your preferred syringe draw mark (e.g., exactly 10 units).
5
Get water volume
Calculator determines exact bacteriostatic water required.
Reference formula
Water (mL) = Vial (mg) ÷ [Target dose (mcg) ÷ (Units to draw × 10)]