IU to units on a syringe
IU and syringe units are not the same. IU is an amount of hormone; units on a U-100 insulin syringe are volume, 100 units to 1 mL. To convert: syringe units = IU needed ÷ (IU in vial ÷ mL of water) × 100.
IU per mL for vials labelled in IU
Concentration after mixing, and how many IU sit in every 10 units of the syringe.
HGH vials
| Vial | 1 mL water | 2 mL water | 5 mL water |
|---|---|---|---|
| 4 IU | 4 IU/mL · 0.4 IU per 10 units | 2 IU/mL · 0.2 IU per 10 units | 0.8 IU/mL · 0.08 IU per 10 units |
| 10 IU | 10 IU/mL · 1 IU per 10 units | 5 IU/mL · 0.5 IU per 10 units | 2 IU/mL · 0.2 IU per 10 units |
| 12 IU | 12 IU/mL · 1.2 IU per 10 units | 6 IU/mL · 0.6 IU per 10 units | 2.4 IU/mL · 0.24 IU per 10 units |
| 16 IU | 16 IU/mL · 1.6 IU per 10 units | 8 IU/mL · 0.8 IU per 10 units | 3.2 IU/mL · 0.32 IU per 10 units |
| 36 IU | 36 IU/mL · 3.6 IU per 10 units | 18 IU/mL · 1.8 IU per 10 units | 7.2 IU/mL · 0.72 IU per 10 units |
HCG vials
| Vial | 1 mL water | 2 mL water | 5 mL water |
|---|---|---|---|
| 5,000 IU | 5,000 IU/mL · 500 IU per 10 units | 2,500 IU/mL · 250 IU per 10 units | 1,000 IU/mL · 100 IU per 10 units |
| 10,000 IU | 10,000 IU/mL · 1,000 IU per 10 units | 5,000 IU/mL · 500 IU per 10 units | 2,000 IU/mL · 200 IU per 10 units |
Calculator for IU vials
Enter the vial size and the water you added.
Arithmetic only. This tool does not recommend a dose; use the one your prescriber gave you.
Questions
Are IU and units on an insulin syringe the same thing?
No. IU (international units) measure an amount of a hormone. Units on an insulin syringe measure volume: 100 units is 1 mL on a U-100 syringe. The two only line up for U-100 insulin itself, which is made at 100 IU per mL.
How do I convert IU to units on a syringe?
Divide the IU in the vial by the mL of water added to get IU/mL. Divide the IU you need by that figure for mL, then multiply by 100. A 10 IU vial mixed with 1 mL is 10 IU/mL, so 1 IU is 0.1 mL, which is 10 units.
How many IU are in one unit on the syringe?
Divide the IU/mL by 100. At 10 IU/mL each syringe unit holds 0.1 IU. At 1,000 IU/mL each syringe unit holds 10 IU.
Can I convert IU to mg?
Only with a conversion factor specific to that substance, because IU is defined separately for each one. There is no general IU to mg conversion.