Syringe unit converter
Check the math on a prescribed dose. This tool turns milligrams into units on a U-100 insulin syringe, so you can catch a mistake before it happens.
It does not tell you what dose to take or whether any substance is safe. Enter only the dose a licensed medical provider prescribed, and confirm the result with your pharmacist.
Draw to this line
Fill in all four steps to see your result.
- Strength of the vial
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- Liquid per dose
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- Your dose in mg
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Always confirm with your pharmacist. If anything here differs from your pharmacy label, trust the label and call them.
The mistakes that cause overdoses
FDA has received reports of people taking several times their intended dose of compounded semaglutide. Many errors came from confusing units with milliliters, or from using the wrong syringe.[1]
Units are not mL
On a U-100 syringe, 10 units is 0.1 mL. Reading 10 units as 10 mL is a hundredfold error.
mg and mcg
1 mg equals 1,000 mcg. Mixing them up changes the dose by a factor of one thousand.
The wrong syringe
U-40 and other syringes use different unit scales. This tool only works with U-100.
Unknown strength
The math is only as good as the label. Products sold online may not contain what the label says. See Purity vs content.
Sources
- FDA. FDA alerts health care providers, compounders and patients of dosing errors associated with compounded injectable semaglutide products. fda.gov
This tool is for checking arithmetic only. It is not medical advice and does not replace your prescriber or pharmacist. Do not use it to choose a dose or to use any substance that was not prescribed to you.