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mg to mL calculator

Type the amount and the strength from your vial's label. You get the mL, and the units on a U-100 syringe.

mL = mg ÷ strength (mg/mL), and units = mL × 100

This does arithmetic on the numbers you type. It doesn't suggest a dose. Check the result with your prescriber or pharmacist.

That's

–mL

Fill in the amount and the label strength

Worked example

1 mg ÷ 2.5 mg/mL = 0.4 mL, which is 40 units on a U-100 syringe.

How the math works

Strength says how much is in each mL, so mL = amount ÷ strength. mcg and mg are turned into one unit first. Then units = mL × 100, because U-100 means 100 units in each mL.

It's the same code the PepBloom app runs, and it runs in your browser. Nothing you type leaves this page.

Questions

How do I convert mg to mL?

Divide the mg by the strength in mg/mL. 1 mg at 2.5 mg/mL is 0.4 mL.

Can I convert mg to mL without the strength?

No. A mg is an amount of medicine and a mL is a volume. The strength on the label is what links them, and it differs from vial to vial.

How many units is 0.4 mL?

40 units on a U-100 syringe. Mixing up mL and units is one of the errors FDA has warned about.

Sources

  1. Humulin R U-100 (insulin human) prescribing information: 100 units in each mL, for use with a U-100 syringe DailyMed
  2. FDA alerts health care providers, compounders and patients of dosing errors associated with compounded injectable semaglutide products (2024) fda.gov

Related

mcg to mg · Units to mL · Peptide calculator

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