How many units should you draw?
Answer a few questions about your vial and see exactly where to stop on the syringe.
Which medication?
Shown on the summary and printout. Useful if you take more than one.
How it works
- ConcentrationPowder: vial mg ÷ mL of water. Liquid: the label value, in mg/mL.
- VolumeDose in mg ÷ concentration = volume in mL.
- UnitsOn a U-100 syringe, 1 mL = 100 IU. So 0.5 mL = 50 IU.
Example: 10 mg vial + 2 mL of water = 5 mg/mL. A 2.5 mg dose = 0.5 mL = 50 IU.
Frequently asked questions
What are units (IU) on the syringe?
They are the marks on a U-100 insulin syringe. Every 100 units equal 1 mL. The calculator converts your dose in mg into those marks.
How much bacteriostatic water should I add?
It depends on the vial and your doctor’s instructions. More water makes the solution more dilute, which increases the units per dose and makes small doses easier to measure.
Is my data stored?
Calculations stay in your browser. The share link carries the data inside the address itself and never goes through our servers.
Can I use it for any medication?
The math works for any injectable measured in mg with a U-100 syringe. The dose itself must always be prescribed by a professional.