Free veterinary calculator
Body surface area calculator.
BSA in m² for dogs and cats, using the standard veterinary chemotherapy-dosing formula. Runs in your browser — no signup, no install.
Patient
Body surface area
Enter a patient weight to compute BSA.
BSA is most commonly used for veterinary chemotherapy dosing (mg/m²) and for normalizing physiologic parameters across body size. This calculator returns BSA only; chemotherapy dose computation is in the Workup app, where drug-specific dosing, species ceilings, and clinical guardrails are maintained.
Need the chemo dose, too?
The Workup mobile app turns BSA into a per-drug dose for doxorubicin, vincristine, CCNU, carboplatin, cyclophosphamide, and L-asparaginase — with species-specific ceilings and clinical notes. Try the app with a 30-day free trial.
Clinical use: This calculator is a decision-support tool for licensed veterinary professionals. BSA is one input to chemotherapy dosing among many. Always verify against the drug-specific protocol and the patient’s individual case before administering chemotherapy. Workup is not FDA- or USDA-cleared as a medical device.