Body Surface Area (BSA) Calculator
Estimate body surface area in m² with the Mosteller formula from height and weight. Education/reference only.
For Reference & Education Only. Not for Real-world Clinical Use.
This calculator is a study and teaching aid. Do NOTuse it to make real patient care, dosing or treatment decisions. Always confirm every value against a licensed clinician, your institution's approved protocols, the drug label and a validated clinical reference. No warranty of accuracy is given, and no liability is accepted for any use.
BSA = √((height cm × weight kg) ÷ 3600). Commonly used for chemotherapy and cardiac index; several formulas exist.
What Is the Body Surface Area (BSA) Calculator?
The Body Surface Area Calculator estimates BSA in square metres using the widely used Mosteller formula from height (cm) and weight (kg). BSA is often used for chemotherapy dosing and cardiac index. This is a reference and education tool only and must not be used for real-world clinical decisions — always confirm with a licensed clinician, the drug label and your institution's approved protocols.
How It Works
Enter height in cm and weight in kg; the Mosteller BSA appears instantly.
When to Use It
As a reference for the Mosteller BSA formula. Not for clinical dosing — several BSA formulas exist and dosing must be clinically verified.
Frequently Asked Questions
- Which formula is used?
- Mosteller: BSA (m²) = √((height cm × weight kg) ÷ 3600). Other formulas (Du Bois, Haycock) give slightly different values.
- Can I dose medication from this?
- No. It's educational only; confirm any BSA-based dose with a clinician and approved references.
Last reviewed: 2026-06-27