Vial to Units

5 units to mg

5 units on a U-100 insulin syringe is 0.05 mL. That holds 0.25 mg when the vial is 5 mg/mL and 0.5 mg at 10 mg/mL. mg = units ÷ 100 × mg/mL.

5 units in mg, by concentration

ConcentrationVolume5 units =
1 mg/mL · 5 mg vial + 5 mL0.05 mL0.05 mg · 50 mcg
2 mg/mL · 10 mg vial + 5 mL0.05 mL0.1 mg · 100 mcg
2.5 mg/mL · 5 mg vial + 2 mL0.05 mL0.125 mg · 125 mcg
3 mg/mL · 15 mg vial + 5 mL0.05 mL0.15 mg · 150 mcg
5 mg/mL · 10 mg vial + 2 mL0.05 mL0.25 mg · 250 mcg
7.5 mg/mL · 15 mg vial + 2 mL0.05 mL0.375 mg · 375 mcg
10 mg/mL · 10 mg vial + 1 mL0.05 mL0.5 mg · 500 mcg
15 mg/mL · 30 mg vial + 2 mL0.05 mL0.75 mg · 750 mcg
20 mg/mL · 20 mg vial + 1 mL0.05 mL1 mg

Calculate for your vial

The calculator is set to work backwards from 5 units. Add your vial size and the water added.

mg
mL

Enter the vial size and the water you added.

Arithmetic only. This tool does not recommend a dose; use the one your prescriber gave you.

Questions

How many mg is 5 units?

5 units on a U-100 syringe is 0.05 mL. Multiply that by the concentration: at 5 mg/mL it is 0.25 mg, at 10 mg/mL it is 0.5 mg.

How many mL is 5 units?

0.05 mL. On a U-100 insulin syringe 100 units is 1 mL.

How many mcg is 5 units?

Work out the mg first, then multiply by 1,000. At 5 mg/mL, 5 units is 0.25 mg, which is 250 mcg.

How do I find the concentration of my vial?

Divide the mg printed on the vial by the mL of water that was added. A 10 mg vial with 2 mL added is 5 mg/mL. If the vial was dispensed as a liquid, the mg/mL is printed on the label.

Nearby conversions

Calculators with vial-size presets