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Dose calculator

Turn a dose in mg or mcg into units on a U-100 insulin syringe, and see how long a vial will last. Preset strengths reflect common compounded formulations, or enter your own.

For a dose of , draw to

units

That's of liquid.

One vial gives you
Syringe

How the math works

  1. Divide your dose by the strength. A 0.5 mg dose of 2.5 mg/mL semaglutide is 0.5 ÷ 2.5 = 0.2 mL.
  2. Multiply mL by 100 to get units. On a U-100 syringe, 1 mL = 100 units, so 0.2 mL = 20 units.
  3. Divide what's in the vial by your dose. A 2 mL vial at 2.5 mg/mL holds 5 mg, so it gives 10 doses of 0.5 mg.
Always follow your prescription

This calculator is for education. Use the dose and syringe line your prescriber gives you, and ask before changing anything. If the number here doesn't match your instructions, contact your prescriber before injecting.

How to read a syringe and inject