Sterile Compounding · Calculation Sheet

Reconstitute

Enter your vial size and how much bacteriostatic water you add — get the exact concentration and syringe draw for any dose.

From the catalog · Vitamins & Injectable Compounds

Vitamin D350,000 IU vial

Cholecalciferol

IU vial — everything below is calculated in IU. Enter your dose in IU.

Common vials

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Peptide in vialIUWater addedmLTarget doseIU

Syringe size (U-100)

Result

Concentration

2.5IU/mL

Per unit

0.03IU

Doses per vial

For a 250 IU dose, draw

10,000units

= 100 mL

100

draw to the 10,000 unit mark of 100 units

This dose exceeds the selected syringe capacity (100 units). Use a larger syringe, add less water, or split the dose.

The math

1. Convert the vial to micrograms: mg × 1000 = mcg
2. Divide by water volume: mcg ÷ mL = mcg/mL
3. A U-100 insulin syringe holds 100 units per mL, so mcg/mL ÷ 100 = mcg per unit
4. Dose ÷ mcg per unit = units to draw.

For educational purposes only. Always confirm concentrations and dosing with a qualified healthcare professional, and follow sterile handling practices.