Quickly estimate prostate gland volume using ellipsoid and bullet formulas with our free Prostate Volume Calculator. This tool is ideal for radiologists, urologists, and other medical professionals who use ultrasound, CT, or MRI measurements in clinical practice.
Ellipsoid Formula: L × W × H × π/6
Bullet Formula: L × W × H × 5π/24
This calculator estimates prostate size based on standard imaging dimensions — length, width, and height — and provides two standard volume formulas:
The output is provided in cubic centimeters (cc), which is equivalent to milliliters (ml) — the standard measurement for prostate volume.
This tool is helpful for:
You can use this calculator in conjunction with other tools, such as PSA density calculators or risk nomograms, like those from MSKCC (Memorial Sloan Kettering).
Prostate size varies by age and individual, but general reference values include:
An enlarged prostate (often due to BPH) typically exceeds 30–40 cc.
If a prostate measures:
The results would be:
These values are automatically displayed side by side for comparison and documentation.
The ellipsoid formula (π/6 × L × W × H) is the most widely accepted in radiology and urology, especially in TRUS and MRI evaluations.
The calculator provides an estimate based on standard formulas. Accuracy depends on the precision of input measurements from imaging modalities, such as ultrasound, CT, or MRI.
Yes. Once the volume is known, divide the PSA (ng/mL) by the volume (cc) to calculate PSA density, a valuable marker in prostate cancer risk assessment.
It is primarily designed for human use, but veterinarians sometimes use similar formulas with adjusted parameters.
For the most accurate volume, all three dimensions are required. If only partial data is available, results may be significantly less accurate.
This site provides general information for educational purposes only and does not constitute financial, legal, medical, or professional advice. calckits.com makes no warranties as to the accuracy or reliability of results. Always consult with a qualified professional for personalized guidance.