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Animal BSA Calculator


Animal body surface area is used to determine an animal's energy, fluid requirements, and drug dosages.


Animal BSA Calculator
Select species:
Enter weight: Weight unit:


Based on the Meeh's formula:

Animal BSA (m2)=  K x (Weight in kg x 1000)2/3 / 10000


K = 10 for birds

K = 10.4 for cats

K = 10.1 for dogs

K = 10.5 for guinea pigs

K = 12.0 for rabbits

K = 9.83 for laboratory rats


K = 12.312 for adults (human)

K = 11.9 for children (human)


* A Formula For Estimating Surace Area Of Dairy Cattle, by Erwin C. Elting, August 1926.

Veterinary Herbal Medicine,  by Susan G. Wynn, Barbara Fougère ,2007, p. 234.



Legal Notices and Disclaimer

All calculator information provided by the is for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease and IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER.

Rev 11/18