← mg to units converter
15 mg is not one fixed number of units. 15 mg is 100 units at 15 mg/mL, 75 at 20 mg/mL and 50 at 30 mg/mL on a U-100 syringe. Arithmetic only, not medical advice.
Units = (dose ÷ concentration) × scale. On a U-100 syringe, 100 units = 1 mL. Arithmetic only — not medical advice.
15 mg in units by concentration
| Concentration | Volume | U-100 units |
|---|---|---|
| 5 mg/mL | 3 mL | 300 |
| 10 mg/mL | 1.5 mL | 150 |
| 15 mg/mL | 1 mL | 100 |
| 20 mg/mL | 0.75 mL | 75 |
| 30 mg/mL | 0.5 mL | 50 |
Values are U-100 syringe units, not mg. Amber values exceed 100 units, more than one standard 1 mL U-100 syringe holds.
15 mg in units by vial size and water added
| Vial | 1 mL water | 2 mL water | 3 mL water | 5 mL water |
|---|---|---|---|---|
| 15 mg | 100 | 200 | 300 | 500 |
| 20 mg | 75 | 150 | 225 | 375 |
| 30 mg | 50 | 100 | 150 | 250 |
Values are U-100 syringe units, not mg. Amber values exceed 100 units, more than one standard 1 mL U-100 syringe holds.
15 mg is one of the labeled tirzepatide doses shown on the tirzepatide dosage calculator.
Frequently asked questions
Is 15 mg always the same number of units?
No. The number of units changes with concentration. 15 mg is 100 units at 15 mg/mL, 75 at 20 mg/mL and 50 at 30 mg/mL on a U-100 syringe.
How many mL is 15 mg?
Divide the dose in mg by the concentration in mg/mL. 15 mg is 1 mL at 15 mg/mL, 0.75 mL at 20 mg/mL and 0.5 mL at 30 mg/mL.
What if 15 mg comes out above 100 units?
15 mg at 5 mg/mL is 300 units, or 3 mL. A 1 mL U-100 syringe holds 100 units, so this volume is more than one syringe holds.