40 units to mg
40 units on a U-100 insulin syringe is 0.4 mL. That holds 2 mg when the vial is 5 mg/mL and 4 mg at 10 mg/mL. mg = units ÷ 100 × mg/mL.
40 units in mg, by concentration
| Concentration | Volume | 40 units = |
|---|---|---|
| 1 mg/mL · 5 mg vial + 5 mL | 0.4 mL | 0.4 mg · 400 mcg |
| 2 mg/mL · 10 mg vial + 5 mL | 0.4 mL | 0.8 mg · 800 mcg |
| 2.5 mg/mL · 5 mg vial + 2 mL | 0.4 mL | 1 mg |
| 3 mg/mL · 15 mg vial + 5 mL | 0.4 mL | 1.2 mg |
| 5 mg/mL · 10 mg vial + 2 mL | 0.4 mL | 2 mg |
| 7.5 mg/mL · 15 mg vial + 2 mL | 0.4 mL | 3 mg |
| 10 mg/mL · 10 mg vial + 1 mL | 0.4 mL | 4 mg |
| 15 mg/mL · 30 mg vial + 2 mL | 0.4 mL | 6 mg |
| 20 mg/mL · 20 mg vial + 1 mL | 0.4 mL | 8 mg |
Calculate for your vial
The calculator is set to work backwards from 40 units. Add your vial size and the water added.
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 40 units?
40 units on a U-100 syringe is 0.4 mL. Multiply that by the concentration: at 5 mg/mL it is 2 mg, at 10 mg/mL it is 4 mg.
How many mL is 40 units?
0.4 mL. On a U-100 insulin syringe 100 units is 1 mL.
How many mcg is 40 units?
Work out the mg first, then multiply by 1,000. At 5 mg/mL, 40 units is 2 mg, which is 2,000 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
- 25 units to mg
- 30 units to mg
- 35 units to mg
- 50 units to mg
- 60 units to mg
- 75 units to mg
- 10 mg to units
- 250 mcg to units
- 40 units to mL
- 50 units to mL
- 0.4 mL to units
- 0.5 mL to units
- All conversions