1. What is IU/mL Conversion?

The IU/mL (International Units per milliliter) conversion calculates biological activity from concentration using substance-specific conversion factors. Different substances have different conversion factors based on their biological activity.

2. How Does the Calculator Work?

The calculator uses the IU/mL conversion formula:

Where:

• \( \text{specific factor} \) — Conversion factor for the specific substance
• \( \text{concentration} \) — Measured concentration (typically in ng/ml)

Explanation: The equation converts mass concentration to international units based on the biological activity of the specific substance.

3. Importance of IU/mL Calculation

Details: IU/mL provides a standardized way to compare biological activity across different measurement methods and laboratories, especially important for hormones, vitamins, and biological drugs.

4. Using the Calculator

Tips: Enter concentration in ng/ml and the substance-specific conversion factor. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find the specific factor for my substance?
A: Specific factors are typically provided by the manufacturer or can be found in product documentation and standard references.

Q2: Why use IU instead of mass units?
A: International Units measure biological activity rather than mass, which is more relevant for substances where activity varies between molecules.

Q3: Are conversion factors the same for all substances?
A: No, each substance has its own specific conversion factor based on its biological activity.

Q4: Can I use this for any concentration unit?
A: The calculator assumes ng/ml input. For other units, you must first convert to ng/ml or adjust the specific factor accordingly.

Q5: How precise are these conversions?
A: Precision depends on the accuracy of both the concentration measurement and the specific factor used.