For educational and reference use only. These calculators do not replace clinical judgement, local protocols, or a qualified clinician. Verify every result independently before it informs patient care.
Body imaging
Bladder Volume / Post-Void Residual
Bladder volume (or post-void residual) using the ellipsoid formula. A post-void residual over ~100 mL is commonly regarded as abnormal, though thresholds are age- and context-dependent.
Result
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Enter all values to calculate.
Formula
Volume = L × W × H × π/6 (≈ 0.523).
References
- Dicuio M, et al. Measurements of urinary bladder volume: comparison of five ultrasound formulas. Arch Ital Urol Androl 2005;77:60–62.
- AUA/EAU guidance: post-void residual interpretation (>100 mL frequently abnormal, context-dependent).
Disclaimer
The ellipsoid coefficient (0.5–0.7 in the literature) and PVR thresholds vary; use your institution’s convention. Not a substitute for catheter volume when precision matters.
For educational and reference use only. These calculators do not replace clinical judgement, local protocols, or a qualified clinician. Verify every result independently before it informs patient care.
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