Side-by-side comparison helps you choose the right calculator for a specific clinical question.
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
Urology
Estimate prostate volume from TRUS or MRI measurements using the ellipsoid formula (π/6 × L × W × H). Normal prostate is 20–30 mL; volume >40 mL suggests clinically significant BPH.
Formula
V = W × H × L × π/6 ≈ W × H × L × 0.523 (cm → mL)
Inputs