Calculated free testosterone from total testosterone, SHBG, and albumin (Vermeulen formula). Clinically relevant when SHBG is abnormal (obesity, hypothyroidism, liver disease).
| Sex | Age | Range | Notes |
|---|---|---|---|
| Female | ≥ 18 yrs | 5 – 30 | Adult female (calculated) |
| Male | ≥ 18 yrs | 170 – 640 | Adult male (calculated; varies by formula) |
⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.