A professional male health assessor aligned with Western guidelines (Endocrine Society,
AUA, NHS, CDC). Evaluates age, body composition, lifestyle, medical history, and
medications to estimate testosterone range, distinguish physiological from pathological
factors, and deliver graded improvement plans with trend tracking and downloadable PDF reports.
Blood testing remains the gold standard for diagnosis.
Enter age, weight (kg/lbs), and waist circumference (cm/in) โ measure waist at navel level.
Select exercise, sleep, stress, and diet quality.
Check medical history and current medications โ these significantly affect testosterone.
Review real-time assessment, factor analysis, and graded plans.
Click Generate to save a record; use Download for PDF report.
Endocrine Society: Total T <300 ng/dL on two morning samples suggests hypogonadism; evaluate symptoms (libido, fatigue, muscle loss).
AUA (2018): Diagnose low T only with consistent symptoms + confirmed low morning levels; TRT for clearly indicated cases with monitoring.
NHS: Waist >94 cm (men) increases metabolic syndrome risk; lifestyle intervention is first-line before pharmacotherapy.
ISSAM: Obesity, diabetes, and opioids are major reversible causes of secondary hypogonadism.
Seek medical check for long-term low testosterone โ especially with erectile dysfunction, infertility, or depression.
Abnormal solution: morning fasting blood test (7โ10 AM) for total T, free T, SHBG, LH, FSH, prolactin.
Opioids, SSRIs, and finasteride commonly lower T โ discuss alternatives with your prescriber.
Severe waist obesity (>102 cm): structured weight-loss program before considering TRT.
Very high estimated levels with no explanation โ rule out exogenous testosterone or androgen-secreting tumors.
Body & Lifestyle Metrics
At navel, standing relaxed
Medical History (select all that apply)
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Assessment & Graded Plans
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Enter valid metrics above. Assessment updates in real time.
Testosterone Science
How Testosterone Works
Testosterone is produced by Leydig cells in the testes, regulated by the hypothalamic-pituitary-gonadal (HPG) axis. LH stimulates T production; SHBG binds circulating T. Free testosterone (~2โ3%) is biologically active. Levels peak in the morning (7โ10 AM) and decline ~1% per year after age 30.
Reference Ranges (Blood Test)
Total T: 300โ1,000 ng/dL (lab-dependent). Free T: 9โ30 ng/dL. Endocrine Society defines hypogonadism as total T <300 ng/dL with symptoms. This calculator estimates lifestyle-influenced range โ not a lab replacement.
Record Tracking & Trend Comparison
Pinch to zoom ยท Chart updates when records are saved
Save at least 2 records via Generate to enable trend comparison.