PSA Density Calculator (Urology)
Enter serum PSA and prostate volume to calculate PSA density (PSAD) and get a urology-standard clinical interpretation.
Enter Values
Total serum PSA from your blood test report.
From TRUS ultrasound or MRI report. cc = mL numerically.
Formula
PSAD = PSA (ng/mL) ÷ Volume (cc)
Result in ng/mL/cc (sometimes written ng/mL²)
Result
Enter PSA level and prostate volume to see PSAD.
PSA Density (PSAD)
ng/mL/cc
0
0.10
0.15
0.30+
Low Risk
Intermediate
Elevated
| Input | Value |
|---|---|
| Serum PSA | |
| Prostate Volume |
Clinical Reference Thresholds
< 0.10 ng/mL/cc
Low Risk
0.10 – 0.14 ng/mL/cc
Intermediate
≥ 0.15 ng/mL/cc
Elevated — Biopsy Discussion
For educational reference only. PSAD is one input among many; consult a urologist for diagnosis and biopsy decisions.
Summary
Enter serum PSA and prostate volume to calculate PSA density (PSAD) and get a urology-standard clinical interpretation.
How it works
- Enter your total serum PSA in ng/mL (from your lab report).
- Enter prostate volume in cc (cubic centimeters, numerically equal to mL) from a TRUS or MRI report.
- Click "Calculate PSAD" — the tool divides PSA by volume.
- Read the result and clinical band: low risk (<0.10), intermediate (0.10–0.14), or elevated (≥0.15 ng/mL/cc).
- Share the PSAD value with your urologist; biopsy decisions depend on many additional clinical factors.
Use cases
- Pre-consultation prep: understand your PSAD before a urology appointment.
- Borderline PSA triage: determine whether a PSA of 4–10 ng/mL warrants a biopsy.
- Repeat PSA monitoring: track PSAD over time when prostate volume is known.
- BPH vs. cancer differentiation: adjust risk assessment for men with large glands.
- Patient education during a shared decision-making conversation about biopsy.
- Clinical reference: verify PSAD arithmetic from TRUS or MRI reports.
Frequently Asked Questions
Last updated: 2026-07-24 ·
Reviewed by Nham Vu