Peptide Reconstitution Calculator Calculate BAC water volume and U-100 syringe draw based on vial size and dose. What size is your vial? (mg) And what's your dose? (mg) Easier to Measure BAC Water 0 mL Syringe Draw 0 units Smaller Injection BAC Water 0 mL Syringe Draw 0 units Units are based on a U-100 insulin syringe, where 100 units = 1 mL.