PSA Score Interpreter Calculator

PSA interpretation with age-specific reference ranges.

Medical Disclaimer

This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.

Inputs

Age

PSA level (ng/mL)

Prostate volume (cc)

Prior PSA (ng/mL)

Months since prior test

Free PSA (%)

Tab to move between fields

Results

Overall risk score (0-100)

18.6

Age-normal PSA limit (ng/mL)3.5

Above age normal? (1=Yes)0

PSA density (ng/mL/cc)0.05

Density normal? (1=Yes)1

PSA velocity (ng/mL/yr)0

Velocity concerning? (1=Yes)0

Free PSA ratio (%)25

Estimated cancer probability (%)5

How to Use This Calculator

Enter your age and total PSA level (ng/mL) from your most recent blood test.
Input prostate volume (cc) from ultrasound if available, for PSA density calculation.
Enter a prior PSA value (ng/mL) and months since that test to calculate PSA velocity.
Add your free PSA percentage (%) if available — lower values increase cancer suspicion.
Review Overall risk score (0–100), Estimated cancer probability (%), and Velocity concerning flag to share with your doctor.

How the result changes with Age

Age	Overall risk score (0-100)
26	22
47	22
71	14.6
92	14.6

What each input means

Age: Your current age in years.
PSA level (ng/mL): Your total PSA blood test result in ng/mL.
Prostate volume (cc): Prostate volume from ultrasound in cubic centimeters (cc). Average is ~30cc.
Prior PSA (ng/mL): Previous PSA result for velocity calculation. Leave 0 if unknown.
Months since prior test: Time between the prior and current PSA tests.
Free PSA (%): Percentage of free (unbound) PSA. Lower values raise cancer suspicion.

What each result means

Overall risk score (0-100): Composite risk score combining PSA level, density, velocity, and free PSA.
Age-normal PSA limit (ng/mL): Upper limit of normal PSA for your age group.
Above age normal? (1=Yes): 1 if your PSA exceeds the age-specific reference range.
PSA density (ng/mL/cc): PSA divided by prostate volume. Below 0.15 is generally normal.
Density normal? (1=Yes): 1 if PSA density is below the 0.15 threshold.
PSA velocity (ng/mL/yr): Rate of PSA change per year. Over 0.75 is concerning.
Velocity concerning? (1=Yes): 1 if PSA velocity exceeds 0.75 ng/mL per year.
Free PSA ratio (%): Your free PSA percentage (lower values increase cancer probability).
Estimated cancer probability (%): Approximate cancer probability based on PSA range and free PSA ratio.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Age = 55, PSA level (ng/mL) = 1.5, Prostate volume (cc) = 30, Prior PSA (ng/mL) = 0 = 6 input(s) provided
Calculate Overall risk score
Overall risk score
18.6 = 18.6
Calculate Age-normal PSA limit
Age-normal PSA limit
3.5 = 3.5
Calculate Above age normal?
Above age normal?
0 = 0