# Free Androgen Index Calculator

## Introduction

The Free Androgen Index (FAI) is a valuable tool in the field of endocrinology and reproductive health. It helps assess the levels of free androgens in the body, which are essential hormones, primarily testosterone and dihydrotestosterone. The Free Androgen Index Calculator simplifies the process of calculating this index, providing insights into androgen-related conditions, including polycystic ovary syndrome (PCOS), hirsutism, and more. This article explores the FAI, its formula, how to use the calculator, an example, frequently asked questions, and a conclusion.

## Formula:

The Free Androgen Index (FAI) is calculated using the following formula:

FAI = (Total Testosterone / Sex Hormone-Binding Globulin (SHBG)) x 100

In this formula:

• Total Testosterone represents the concentration of testosterone in the bloodstream, typically measured in nanograms per deciliter (ng/dL).
• SHBG is the Sex Hormone-Binding Globulin, a protein that binds to and regulates the activity of sex hormones, including testosterone.

The FAI calculation helps determine the proportion of bioavailable (free) testosterone in the body, which is unbound and can exert its effects.

## How to Use?

Utilizing the Free Androgen Index Calculator is a simple process. Here’s a step-by-step guide:

1. Input: Begin by entering the total testosterone level (in ng/dL) and the SHBG level (also in ng/dL) into their respective fields.
2. Calculate: Click the “Calculate” button, and the tool will display the calculated Free Androgen Index.
3. Interpretation: Once the FAI is calculated, you can interpret the results. A higher FAI indicates elevated levels of bioavailable androgens, while a lower FAI suggests lower levels. These results can be useful for diagnosing and managing conditions related to androgen levels.

## Example:

Suppose you have total testosterone levels of 60 ng/dL and SHBG levels of 20 ng/dL. Here’s how you can use the Free Androgen Index Calculator:

1. Input: Enter 60 in the “Total Testosterone” field and 20 in the “SHBG” field.
2. Calculate: Click the “Calculate” button.

The result will be an FAI of 300, indicating that 300% of the total testosterone is bioavailable.

## FAQs?

### 1. What is a normal range for the Free Androgen Index (FAI)?

The normal range for FAI can vary slightly depending on the laboratory and the units used for measurements. However, a typical reference range for FAI is between 30% and 120%. Values outside this range may indicate hormonal imbalances.

### 2. What medical conditions can be assessed using the Free Androgen Index?

The FAI is often used to assess conditions related to androgen levels, such as PCOS, hirsutism, and hypogonadism. It can also aid in the evaluation of fertility and androgen-related disorders.

### 3. How can I improve my FAI if it’s out of the normal range?

If your FAI is outside the normal range, it’s essential to consult a healthcare provider for a thorough evaluation. Treatment options may include lifestyle changes, medication, or other interventions, depending on the underlying cause of the imbalance.

## Conclusion:

The Free Androgen Index Calculator is a valuable tool for healthcare professionals and individuals interested in assessing androgen levels in the body. By simplifying the calculation of the Free Androgen Index, this tool aids in the diagnosis and management of conditions related to androgen hormones. Whether you’re a medical practitioner seeking to evaluate a patient’s androgen status or an individual monitoring your own health, the FAI Calculator offers a convenient and informative solution. Remember that interpreting the FAI should be done in consultation with a healthcare provider for a comprehensive understanding of your hormonal health.