Convert IU to mL or cc using the product’s concentration in IU per mL, such as U-100 insulin, or work out IU from a volume. Check doses with a pharmacist.
Quick Overview: IU to mL / cc
To convert International Units (IU) into a volume in milliliters (mL) or cubic centimeters (cc), you must know the product concentration in IU per mL.
- Formula: mL = IU ÷ (IU/mL)
- 1 mL = 1 cc
- Insulin U-100: 50 IU = 0.5 mL
- Insulin U-40: 20 IU = 0.5 mL
- Heparin 5,000 IU/mL: 5,000 IU = 1 mL
- Vitamin D 400 IU/mL: 2,000 IU = 5 mL
Choose the matching unit definition and exact preparation strength. Presets describe concentration only; they do not determine a dose or convert pen-dial or syringe markings.
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IU to mL (cc) Formula
The following formula is used to convert a dose in International Units (IU) into a liquid volume in milliliters (mL) or cubic centimeters (cc).
Since 1 mL is exactly equal to 1 cc, the same number also represents the volume in cc.
Variables:
- mL is the liquid volume in milliliters
- IU is the dose in International Units
- IU/mL is the concentration of the preparation
- cc is numerically equal to mL
To calculate the volume, divide the prescribed IU dose by the concentration listed on the product label in IU per mL.
IU to mL/cc Conversion Table
The table below illustrates the arithmetic for an amount of 100 matching product units at the stated concentrations. Product labels and unit definitions vary; these are conditional examples, not dose or administration instructions.
| Preparation | Example matching units/mL | Volume for 100 IU (mL / cc) |
|---|---|---|
| Insulin U-100 | 100 IU/mL | 1 mL (1 cc) |
| Insulin U-40 | 40 IU/mL | 2.5 mL (2.5 cc) |
| Heparin injection | 5,000 IU/mL | 0.02 mL (0.02 cc) |
| Heparin high strength | 10,000 IU/mL | 0.01 mL (0.01 cc) |
| Vitamin D solution | 400 IU/mL | 0.25 mL (0.25 cc) |
What is IU to mL/cc Conversion?
International Units (IU) measure biological activity or potency, not physical volume. Milliliters (mL) and cubic centimeters (cc) measure how much liquid is present. Because of this, there is no single universal conversion from IU to mL. The correct conversion depends entirely on the labeled concentration of the specific medication or solution, expressed in IU per mL.
For example, 100 IU of one product may equal 1 mL, while 100 IU of another product may equal 0.02 mL. That is why you must always use the exact preparation strength when converting IU to mL or cc.
How to Convert IU to mL/cc?
The following steps outline how to convert International Units into milliliters or cubic centimeters.
- First, determine the prescribed dose in IU.
- Next, find the product concentration listed in IU per mL.
- Divide the IU dose by the concentration using the formula mL = IU ÷ (IU/mL).
- Use the same numeric result for cc, since 1 mL = 1 cc.
- Check the arithmetic, exact product concentration, unit definition and device instructions with a qualified professional; do not convert device markings using this calculator.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Dose = 50 IU
Preparation = Insulin U-100 (100 IU/mL)
Volume = 50 ÷ 100 = 0.5 mL = 0.5 cc
