Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Urology
Estimate bladder volume from ultrasound length, width, and height measurements using the ellipsoid formula (0.523 × L × W × H). Essential for urinary retention diagnosis and BPH assessment.
Formula
Volume (mL) = Width × Height × Depth × 0.52
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Urology
Interpret post-void residual (PVR) volume for urinary retention and BPH evaluation. PVR <50 mL: normal. 50–200 mL: equivocal. >300 mL: significant retention requiring intervention.
Formula
PVR interpretation: Normal < 50 mL, Mild 50–99, Moderate 100–199, Significant 200–299, Severe ≥ 300 mL.
Inputs