09/24/2026
WHAT IS PSA DENSITY?
A PSA result is one number. PSA density helps put that number in context.
PSA stands for prostate-specific antigen, a protein produced by prostate cells. A PSA test measures its level in the blood.
PSA density, sometimes shortened to PSAD, compares the PSA level with the size, or volume, of the prostate. It is calculated by dividing PSA by prostate volume, commonly estimated through MRI or ultrasound.
Why does size matter? A larger prostate can produce more PSA, including from benign enlargement. The same PSA level may therefore be interpreted differently depending on prostate size.
Doctors may consider PSA density when assessing risk, deciding whether further evaluation is appropriate or monitoring someone on active surveillance. It is not a diagnosis. A higher PSA density does not prove cancer, and a lower one does not rule it out. It should be considered with PSA history, MRI, biopsy findings and individual risk factors.
You may hear 0.15 used as a reference point. It is not a universal pass-or-fail cutoff and should not be interpreted alone.
Consider asking:
“What is my prostate volume?”
“What is my PSA density?”
“How does it fit with my other results?”
Know your numbers. Ask what they mean. Stay engaged in your care.
This infographic is part of Blue Cure’s 2026 Know Your Numbers initiative, supported by H-E-B.
Download Blue Cure’s Know Your Numbers Men’s Health Checklist at BlueCure.org.
Donate at BlueCure.org/donate.
Ask more questions. Start the conversation.
For educational purposes only. Not a substitute for professional medical advice.