PepKeep
Units calculator

How many units is 5 mg?

With a 10 mg vial mixed with 2 mL of water, 5 mg is 100 units on a U-100 syringe. With a different vial or amount of water the answer changes, so find yours in the chart below.

units = 5 mg ÷ (mg in the vial ÷ mL of water) × 100

5 mg in units, by vial and water

1 mL water2 mL water3 mL water
5 mg vial100 units200: over one syringe300: over one syringe
10 mg vial50 units100 units150: over one syringe
15 mg vial33.33 units66.67 units100 units
20 mg vial25 units50 units75 units
30 mg vial16.67 units33.33 units50 units
60 mg vial8.33 units16.67 units25 units

Units on a U-100 insulin syringe, rounded to two places. Other vial or water amount? Use the free dose calculator.

How to work it out yourself

  1. Find the strength: mg in the vial ÷ mL of water. A 10 mg vial with 2 mL is 5 mg per mL.
  2. Find the volume: your dose ÷ the strength. 5 mg ÷ 5 mg per mL = 1 mL.
  3. Turn mL into units: × 100 on a U-100 syringe. 1 mL = 100 units.

Other amounts

0.25 mg0.5 mg1 mg2 mg2.5 mg7.5 mg10 mg12.5 mg15 mg

All mg-to-units charts

Never do this math again

PepKeep works out the units from your own vial and water, reminds you at every dose and counts your vials down. On iPhone you can just ask: "Siri, PepKeep, how many units do I draw?" No app to open.

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This is math only, not medical advice, and never a dose recommendation. Use the dose your prescriber gave you and check the syringe before every shot. A U-100 syringe holds 100 units in 1 mL; 0.5 mL and 0.3 mL syringes hold 50 and 30 units.

Sources

This page only does the math. The FDA has warned that confusion between milliliters, milligrams and units can lead to dosing errors, so check your syringe markings too.