1. What is a Testosterone/SHBG Ratio Calculator?

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

Purpose: It helps assess bioavailable testosterone levels, which is important for evaluating hormonal balance and potential androgen deficiency.

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 what proportion of testosterone is potentially bioavailable, as SHBG binds to testosterone making it inactive.

3. Importance of Testosterone/SHBG Ratio

Details: This ratio is a better indicator of androgen status than total testosterone alone, as it reflects the biologically active fraction of testosterone.

4. Using the Calculator

Tips: Enter your testosterone and SHBG levels in nmol/L (from blood tests). Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal Testosterone/SHBG ratio?
A: Typically 0.5-1.0 in healthy men, but consult your healthcare provider for interpretation specific to your case.

Q2: Why is this ratio important?
A: It better reflects bioavailable testosterone than total testosterone levels alone.

Q3: When would this ratio be low?
A: Low ratios may occur with high SHBG (aging, liver disease) or low testosterone (hypogonadism).

Q4: How often should this ratio be checked?
A: Only as recommended by your doctor when evaluating symptoms of androgen deficiency.

Q5: Can this calculator be used for women?
A: No, reference ranges and interpretation are different for women.