1 mg vial, 1 mL water, 1 mg/mL.
1 milligrams divided by 1 millilitres of bacteriostatic water gives 1 mg per mL. Every unit reading on this page follows from that one number.
The direct answer
A 1 mg vial reconstituted with 1 mL of bacteriostatic water is 1 mg/mL. One unit on a U-100 syringe is 0.01 mL, so one unit of this solution contains 0.01 mg, and 10 units contains 0.1 mg.
1 mg ÷ 1 mL = 1 mg/mL
The 1 mg in 1 mL case is the reference point the other concentrations are read against. This page exists because that exact combination is searched for: "1mg/1ml standard format".
This page is arithmetic only. It converts numbers you already have from the vial in front of you and the prescription you were given. It does not tell you how much water to add, how much to take, or how often. Those are medical decisions for a licensed clinician who knows your history.
Amount to units at 1 mg/mL
Every row is computed for this concentration only. Rows that would exceed a 1 mL U-100 barrel are left out, because they cannot be drawn in one go.
| Amount | In mcg | Volume | U-100 units |
|---|---|---|---|
| 0.1 mg | 100 mcg | 0.1 mL | 10 u |
| 0.25 mg | 250 mcg | 0.25 mL | 25 u |
| 0.5 mg | 500 mcg | 0.5 mL | 50 u |
| 0.75 mg | 750 mcg | 0.75 mL | 75 u |
| 1 mg | 1000 mcg | 1 mL | 100 u |
0.1 mg on the barrel
1 mg in 1 mL = 1 mg/mL → 0.1 mg dose = 0.1 mL = 10 units
Questions people actually type
What concentration is a 1 mg vial in 1 mL?
1 mg divided by 1 mL is 1 mg/mL. On a U-100 syringe one unit is 0.01 mL, so a single unit of this solution holds 0.01 mg.
How many units is 0.1 mg from a 1 mg vial in 1 mL?
0.1 mg divided by 1 mg/mL is 0.1 mL, which reads 10 units on a U-100 syringe.
Does the 1 mg vial still hold 1 mg after adding water?
Yes. The mass is fixed by the label. Adding 1 mL of bacteriostatic water changes only the concentration, to 1 mg/mL, and therefore only the unit reading for a given amount.
Related conversions
Worked vial cases
Run your own numbers
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