Normal Prostate Volume by Age
The prostate gland naturally grows as men age. What is considered "normal" for a man in his 70s would be considered enlarged for a man in his 40s.
Average Prostate Size Chart
The following table displays the average prostate volume (in cc or mL) expected for different age groups.
| Age Group | Average Volume | Upper Limit of Normal |
|---|---|---|
| 20s - 30s | 20 cc | 25 cc |
| 40s | 25 cc | 30 cc |
| 50s | 30 - 35 cc | 40 cc |
| 60s | 35 - 40 cc | 45 cc |
| 70s + | 40 - 50 cc | > 50 cc (Commonly Enlarged) |
When is it "Enlarged"?
Clinically, a prostate volume greater than 30 cc is often the threshold for diagnosing Benign Prostatic Hyperplasia (BPH). However, as shown in the chart above, many men over 60 naturally exceed this threshold without significant symptoms.
Treatment is usually based on symptoms (urinary frequency, weak stream) rather than size alone, unless the size is causing complications.
Key Takeaway
A 40cc prostate is normal for a 70-year-old but would be considered significantly enlarged for a 30-year-old. Always interpret volume in the context of age.