Reconstitution Tool

Reconstitution Calculator

Calculate exact dose volume and insulin syringe units from vial size, bacteriostatic water, and desired dose — no math required.

Common Vial Sizes

Vial Size

Bacteriostatic Water

Desired Dose

mcg

Syringe Size

Draw to

10units

0.100 mL per dose

0255075100

Concentration

2.50 mg/mL

Doses Per Vial

Volume / Dose

0.100 mL

How It Works

Set Your Vial

Enter the vial amount (mg) and how much bacteriostatic water you're adding.

Choose Your Dose

Input your desired dose in micrograms (mcg) and select your syringe size.

Read Your Draw

The calculator shows exactly how many units to pull on your syringe.

Formula Reference

ConcentrationVial amount (mg) ÷ Water added (mL) = mg/mL

Volume / DoseDesired dose (mcg) ÷ Concentration (mcg/mL) = mL per dose

Syringe UnitsVolume per dose (mL) × 100 = units on a U-100 insulin syringe

Doses / VialVial amount (mg) × 1000 ÷ Desired dose (mcg) = total doses

Educational tool. Output is a mathematical calculation based on the values you enter. Consult a qualified professional for any health-related decisions.