Reconstitution calculator
Vial, water, dose - the barrel shows your draw.
Loading calculator…
Related tools
Dose to Units CalculatorConvert a target peptide dose in mcg, mg, or IU into insulin-syringe units for a given reconstitution.→Blend / Stack CalculatorCalculate reconstitution and dosing for multi-peptide stacks.→Reverse CalculatorFind the optimal bacteriostatic water volume for your target concentration.→GLP-1 Dose SchedulerGenerate week-by-week dose escalation schedules for semaglutide, tirzepatide, and retatrutide.→
How much bacteriostatic water should I add?+
Most users add 1-3 mL. More water = lower concentration = easier to measure small doses. Use our Reverse Calculator to find the optimal volume.
What is the concentration after reconstitution?+
Concentration = vial size (mg) ÷ water added (mL). For a 5 mg vial with 2 mL water, the concentration is 2.5 mg/mL.
How do I read insulin syringe units?+
Each unit on a U-100 syringe = 0.01 mL. A 0.3 mL syringe has 30 units, a 0.5 mL syringe has 50, and a 1.0 mL syringe has 100.
Does the peptide type matter for reconstitution math?+
No - the reconstitution formula is universal. Concentration depends only on vial size and water volume, not the specific peptide.
How long does a reconstituted vial last?+
21-28 days when stored at 2-8°C (refrigerated) after reconstitution with bacteriostatic water.