50 mcg to units on an insulin syringe
50 mcg to units depends on how strong your vial is. At 2.5 mg/mL, 50 mcg (0.05 mg) is 2 units on a U-100 insulin syringe. Use the calculator for your own vial and water, or find your mix in the chart below.
Units to draw
7.5units
Draw 7.5 units on a U-100 syringe, just below the 8-unit mark.
- Dose
- 50 mcg (0.05 mg)
- Volume
- 0.075 mL
- Concentration
- 666.67 mcg/mL (0.66667 mg/mL)
- Per unit
- 6.67 mcg (0.00667 mg)
- Full doses in vial
- 40
Show the math
- Convert the vial amount to mcgmg × 1,000 = mcg2 mg × 1,000 = 2,000 mcg
- Concentrationvial (mcg) ÷ water (mL) = mcg per mL2,000 mcg ÷ 3 mL = 666.67 mcg/mL (0.66667 mg/mL)
- Volume to drawdose (mcg) ÷ concentration (mcg/mL) = mL50 mcg ÷ 666.67 mcg/mL = 0.075 mL
- Units to drawmL × units per mL = units0.075 mL × 100 units/mL = 7.5 units
- Amount in each unitmcg per mL ÷ units per mL = mcg per unit666.67 mcg/mL ÷ 100 units/mL = 6.67 mcg per unit (0.00667 mg)
- Doses in the vialvial (mcg) ÷ dose (mcg), rounded down2,000 mcg ÷ 50 mcg = 40 full doses
50 mcg to units chart
Units on a U-100 syringe for 50 mcg at common vial sizes and water volumes, calculated by this site. A dash means 50 mcg is more than the whole vial.
| Vial | 1 mL water | 2 mL water | 3 mL water |
|---|---|---|---|
| 2 mg | 2.5 units | 5 units | 7.5 units |
| 5 mg | 1 units | 2 units | 3 units |
| 10 mg | 0.5 units | 1 units | 1.5 units |
| 15 mg | 0.3 units | 0.7 units | 1 units |
| 20 mg | 0.3 units | 0.5 units | 0.8 units |
| 30 mg | 0.2 units | 0.3 units | 0.5 units |
Across these mixes, 50 mcg measures between 2 and 7.5 units where it fits one syringe. In 13 mixes it is under 2 units, too small to read reliably.
50 mcg to units by concentration
If you already know your concentration in mg per mL, read it straight from this table.
| Concentration | Units (U-100) | Volume |
|---|---|---|
| 0.5 mg/mL (500 mcg/mL) | 10 units | 0.1 mL |
| 1 mg/mL (1,000 mcg/mL) | 5 units | 0.05 mL |
| 2 mg/mL (2,000 mcg/mL) | 2.5 units | 0.025 mL |
| 2.5 mg/mL (2,500 mcg/mL) | 2 units | 0.02 mL |
| 5 mg/mL (5,000 mcg/mL) | 1 units | 0.01 mL |
| 10 mg/mL (10,000 mcg/mL) | 0.5 units | 0.005 mL |
How do you convert 50 mcg to units?
Divide the amount in mcg by ten times your concentration in mg/mL: units = mcg ÷ (10 × mg/mL). For 50 mcg at 2.5 mg/mL that is 50 ÷ (10 × 2.5) = 2 units.
Your concentration is the peptide in the vial divided by the water you added: a 2 mg vial with 3 mL of water is 0.67 mg/mL. The reconstitution math guide shows every step.
Which syringe fits 50 mcg?
With a 2 mg vial and 3 mL of water, 50 mcg is 7.5 units, which fits a 0.3 mL (30-unit) U-100 syringe. Smaller barrels have wider spacing between marks, so they are easier to read for small amounts.
See the insulin syringe units chart for how each syringe size is marked.
Frequently asked questions
How many units is 50 mcg?
It depends on the concentration of your vial. At 2.5 mg/mL, 50 mcg is 2 units on a U-100 syringe; at 5 mg/mL it is 1 units.
Is 50 mcg the same number of units on a 30, 50 and 100-unit syringe?
Yes, if they are all U-100 syringes. Every U-100 syringe holds 100 units per mL; the barrel size only changes how many units fit and how easy the marks are to read.
How many units is 50 mcg on a U-40 or U-50 syringe?
Fewer units, because each unit holds more liquid. With a 2 mg vial and 3 mL of water, 50 mcg is 7.5 units on U-100, 3.8 on U-50 and 3 on U-40.
What is 50 mcg in mg?
50 mcg is 0.05 mg. There are 1,000 mcg in 1 mg.