Ellipsoid Volume Calculator

Disclaimer: The author makes no claims of the accuracy of the information contained herein; this information is for educational purposes only and is not a substitute for clinical judgment.

Ellipsoid volume = L x W x H x π / 6

"Bullet" (cylinder + half ellipsoid) volume = L x W x H x / 24

The "bullet" volume may be a better representation of prostate volume for prostate glands smaller than 55 mL.

MacMahon PJ, Kennedy A-M, Murphy DT, et al. Modified prostate volume algorithm improves transrectal US volume estimation in men presenting for prostate brachytherapy. Radiology 2009; 250:273-280

The PSA density calculation assumes that the length, width, and height are provided in centimeters, and the PSA in ng/mL.