PSA Density Calculator
Divide your PSA level by prostate volume (from TRUS or MRI) to get PSA density and interpret your prostate cancer risk level.
Enter Values
From your blood test lab report.
From TRUS ultrasound or MRI report. mL and cm³ are numerically equal.
Formula
PSAD = PSA (ng/mL) ÷ Prostate Volume (mL)
Result
Enter PSA level and prostate volume to see the result.
PSA Density
ng/mL²
| Input | Value |
|---|---|
| PSA Level | |
| Prostate Volume |
Reference Thresholds
< 0.10 ng/mL²
Low Risk
0.10 – 0.14 ng/mL²
Borderline
≥ 0.15 ng/mL²
Elevated Risk
This result is for educational purposes only. PSA density is one factor among many; consult a qualified urologist for diagnosis and biopsy decisions.
Summary
Divide your PSA level by prostate volume (from TRUS or MRI) to get PSA density and interpret your prostate cancer risk level.
How it works
- Enter your total serum PSA level in ng/mL (from your lab report).
- Enter your prostate volume in mL or cm³ (from TRUS ultrasound or MRI report).
- Click "Calculate" — the tool divides PSA by volume to produce PSA density in ng/mL².
- Review the risk interpretation: <0.10 (low), 0.10–0.14 (borderline), ≥0.15 (elevated).
- Share the result with your urologist; biopsy decisions depend on many additional factors.
Use cases
- Contextualizing a borderline PSA reading before deciding on biopsy.
- Comparing pre- and post-treatment PSA density to track therapy response.
- Patient education prior to a urology consultation.
- Screening-program support: flagging men who may benefit from further workup.
- Academic or clinical reference for PSAD threshold discussions.
Frequently Asked Questions
Last updated: 2026-07-24 ·
Reviewed by Nham Vu