Enter Screening Inputs
Use the responsive calculator grid below. It shows three columns on large screens, two on medium screens, and one on mobile.
Example Data Table
| Profile | Age | PSA | Free PSA % | Volume | Velocity | Adjusted PSA | Estimated Band |
|---|---|---|---|---|---|---|---|
| Routine review | 49 | 1.90 | 29 | 34 | 0.18 | 1.90 | Low |
| Borderline PSA | 58 | 3.80 | 19 | 38 | 0.42 | 3.80 | Moderate |
| Higher concern | 66 | 6.70 | 11 | 31 | 0.96 | 6.70 | High |
| Medication-adjusted PSA | 72 | 4.20 | 9 | 28 | 1.25 | 8.40 | Very High |
Formula Used
This calculator uses an educational weighted model. It is designed for screening awareness, not diagnosis.
- Adjusted PSA = Total PSA × 2 when a 5-alpha-reductase inhibitor is used; otherwise Total PSA.
- PSA Density = Adjusted PSA ÷ Prostate Volume.
- Weighted Score = Age points + PSA points + Free PSA points + Density points + Velocity points + Family history points + DRE points + Symptom points + Hematuria points − Prior negative biopsy credit.
- Risk Index (%) = clamp((Weighted Score ÷ 150) × 100, 0, 100).
Point bands are intentionally conservative. Lower free PSA, higher PSA density, faster PSA velocity, abnormal exam findings, and strong family history all add more points.
How to Use This Calculator
- Enter the latest PSA value, free PSA percentage, prostate volume, and PSA velocity.
- Select the family history, DRE finding, symptom severity, and related clinical flags.
- Choose whether the person uses finasteride or dutasteride, because the tool adjusts PSA.
- Click Check Risk to show the result above the form.
- Review the risk band, score, adjusted PSA, PSA density, interpretation, and factor chart.
- Export the result using the CSV or PDF buttons.
FAQs
1. Is this a prostate cancer diagnosis tool?
No. It is an educational screening checker. It combines common concern factors into a simple risk index, but it cannot diagnose cancer or rule it out.
2. Why does the calculator adjust PSA for some medicines?
Finasteride and dutasteride can lower measured PSA. The checker doubles PSA when those medicines are selected, giving a rough adjustment for screening review.
3. What does free PSA percentage mean here?
Lower free PSA percentages generally raise concern in screening discussions. The checker gives more points when free PSA is lower and fewer points when it is higher.
4. Why is prostate volume included?
Volume helps estimate PSA density, which compares PSA to gland size. A higher density often deserves closer attention than PSA alone.
5. Do urinary symptoms always mean higher cancer risk?
No. Symptoms are non-specific and may come from benign enlargement, infection, or irritation. The checker weights symptoms lightly for that reason.
6. Why can recent infection change the interpretation?
Prostatitis or a urinary infection can temporarily raise PSA. The checker adds a caution note so the result is interpreted more carefully.
7. What does a prior negative biopsy do in the model?
A prior negative biopsy gives a small downward adjustment. It does not remove concern, especially when new PSA trends or exam findings are abnormal.
8. When should a high result be discussed promptly?
Prompt review is sensible when the index is high, PSA is clearly elevated, DRE is abnormal, free PSA is very low, or visible blood is present.