Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Urology
Calculate PSA doubling time (PSADT) to monitor prostate cancer progression after treatment. PSADT <3 months: aggressive recurrence. 3–12 months: intermediate. >12 months: lower-risk.
Formula
PSADT (months) = ln(2) × (days between / 30.44) ÷ ln(PSA₂ / PSA₁)
Inputs
Urology
Calculate PSA density (PSAD) to differentiate BPH from prostate cancer. PSAD ≥0.15 ng/mL/mL indicates higher cancer risk and may warrant biopsy even with borderline total PSA levels.
Formula
PSA Density = PSA (ng/mL) ÷ Prostate Volume (mL)
Inputs