400 mcg to Units (U-100 Insulin Syringe)
400 mcg = 0.4 mg. Units depend on concentration: with a 5 mg vial mixed in 2 mL of bacteriostatic water, 400 mcg is 16 units (0.16 mL) on a U-100 syringe.
To draw 400 mcg, fill to
16units= 0.16 mL
400 mcg to Units chart
Units to draw for 400 mcg on a U-100 syringe, by vial size and water volume. "—" means the dose does not fit in a 1 mL syringe or is too small to measure.
| Vial | 1 mL water | 2 mL water | 3 mL water |
|---|---|---|---|
| 2 mg | 20 u | 40 u | 60 u |
| 5 mg | 8 u | 16 u | 24 u |
| 10 mg | 4 u | 8 u | 12 u |
| 15 mg | 2.7 u | 5.3 u | 8 u |
| 20 mg | 2 u | 4 u | 6 u |
| 30 mg | 1.3 u | 2.7 u | 4 u |
FAQ
How many units is 400 mcg?
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400 mcg = 0.4 mg. Units depend on concentration: with a 5 mg vial mixed in 2 mL of bacteriostatic water, 400 mcg is 16 units (0.16 mL) on a U-100 syringe.
How many units is 400 mcg with a 5 mg vial vs a 10 mg vial?
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Mixed with 2 mL of water: a 5 mg vial gives 16 units, a 10 mg vial gives 8 units. A stronger vial means fewer units for the same dose.
How do I calculate 400 mcg in units myself?
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Concentration = vial mg × 1,000 ÷ water mL (in mcg per mL). Volume = 400 mcg ÷ concentration. Units = volume × 100 on a U-100 syringe.