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Prostate Cancer Risk Calculator

Work out prostate cancer risk instantly with clear inputs, formula shown and shareable results.

About Prostate Cancer Risk Calculator

Calculates PSA density from PSA and prostate volume and interprets the free PSA percentage, the two published refinements used when total PSA is equivocal.

Formula

PSA density and free PSA

PSA density = total PSA / prostate volume; 0.15 ng/mL/cc or above raises suspicion. Free PSA below 10% is associated with a higher cancer probability

Worked example

With the default values below, Prostate Cancer Risk Calculator returns PSA density of 0.1444. Change any input above and every figure here is recalculated in your browser.

Inputs used

Total PSAaccepts 0.1–100 ng/mL
6.5 ng/mL
Prostate volumeaccepts 10–200 cc
45 cc
Free PSAaccepts 1–50 %
15 %

Results

PSA density
0.1444 ng/mL/cc
Density interpretation
PSA density below 0.15
Free PSA interpretation
Free PSA in the intermediate range
PSA density
144.4 pg/mL/cc

Step by step

  1. 1Values used
  2. 2PSA density and free PSA
  3. 3PSA density= 0.1444 ng/mL/cc
  4. 4Density interpretation= PSA density below 0.15
  5. 5Free PSA interpretation= Free PSA in the intermediate range
  6. 6PSA density= 144.4 pg/mL/cc

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Why adjust PSA for volume?

Benign enlargement raises PSA, so density separates gland size effects from cancer risk.

Does this replace MRI or biopsy?

No. Multiparametric MRI and targeted biopsy remain the diagnostic pathway.

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Prostate Cancer Risk Calculator – Calculate PSA density