0.5 mL to units
0.5 mL in units on a U-100 insulin syringe, which syringe holds it, and how much peptide that is at common strengths.
0.5 mL is 50 units on a U-100 insulin syringe.
On a U-40 syringe, 0.5 mL would read 20 units. It fits a 0.5 mL (50 unit) U-100 syringe.
With a U-100 insulin syringe in hand, 0.5 mL comes to 50 units. A U-40 syringe uses a different scale, and the same 0.5 mL shows 20 units there, so the kind of syringe in your hand makes a real difference.
- A U-100 syringe shows 50 units when you draw 0.5 mL.
- A U-40 syringe shows 20 units for that same 0.5 mL.
- For a 0.5 mL dose, a 50 unit U-100 syringe is the closest fit.
Reading a U-100 syringe at 0.5 mL
This scale tells you that 100 units fill 1 mL. One unit here equals 0.01 mL, so 50 units puts you right at the 0.5 mL mark.
Those small marks printed along the barrel are known as ticks. If you have one of the smaller 0.3 mL or 0.5 mL syringes, every tick marks 1 unit. On the 1 mL syringe, every tick marks 2 units, and 25 ticks brings you to 50 units.
Choosing a syringe for 0.5 mL
The 0.3 mL syringe will not work, since it only holds 30 units. A 0.5 mL syringe takes exactly 50 units, which means a full 0.5 mL reaches the top line. A 1 mL syringe handles it too, with 0.5 mL sitting halfway.
| Syringe | Scale | Total when full | Reading at 0.5 mL | Tick spacing |
|---|---|---|---|---|
| 0.3 mL | U-100 | 30 units | Not enough room | 1 unit per tick |
| 0.5 mL | U-100 | 50 units | 50 units | 1 unit per tick |
| 1 mL | U-100 | 100 units | Half full, 50 units | 2 units per tick |
| 1 mL | U-40 | 40 units | Half full, 20 units | 1 unit per tick |
A U-40 syringe uses its own scale, where 40 units fill 1 mL. If your dose was written for a U-100 syringe, a U-40 one would give you a different amount, so it's worth a quick look at the label before you fill it.
Checking your dose
If you're unsure how much medicine is in your dose, ask your pharmacist or doctor. They can check it against the strength on your vial, so you know you're taking the right amount.
Convert another amount
Common questions
How many units does 0.5 mL of tirzepatide give?
On a U-100 syringe you still see 50 units, because units count liquid no matter which medicine it is. The milligrams you end up with come from the strength printed on your vial or pen.
Does 5 units of insulin equal 0.5 mL?
No. Five units on a U-100 syringe measure one tenth of the 0.5 mL in question.
What units do 0.1 mL and 0.25 mL measure on an insulin syringe?
With a U-100 syringe, 0.1 mL measures 10 units, and 0.25 mL measures 25 units. Both amounts fit inside a 0.3 mL syringe.