1. What is Testosterone SHBG Ratio?

Definition: This calculator determines the ratio of testosterone to sex hormone-binding globulin (SHBG) in females.

Purpose: It helps assess bioavailable testosterone levels, which is important for evaluating hormonal balance in women.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Testosterone/SHBG ratio (dimensionless)
• \( T \) — Testosterone level (nmol/L)
• \( SHBG \) — Sex hormone-binding globulin level (nmol/L)

Explanation: The ratio indicates how much testosterone is potentially bioavailable versus bound to SHBG.

3. Importance of Testosterone/SHBG Ratio

Details: This ratio helps evaluate androgen status in women. Higher ratios may indicate hyperandrogenism, while lower ratios may suggest reduced bioavailable testosterone.

4. Using the Calculator

Tips: Enter testosterone and SHBG levels in nmol/L. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal ratio for women?
A: Typical ratios range from 0.01 to 0.06 in healthy premenopausal women, but consult a healthcare provider for interpretation.

Q2: Why is this ratio important?
A: It helps assess bioavailable testosterone, which is more clinically relevant than total testosterone alone.

Q3: When would this ratio be elevated?
A: In conditions like PCOS, congenital adrenal hyperplasia, or with certain medications.

Q4: How often should this be tested?
A: Testing frequency should be determined by a healthcare provider based on symptoms and conditions.

Q5: Does this replace free testosterone measurement?
A: While related, they provide different information. The ratio is a simpler calculation but may not replace specialized tests.