Body Surface Area (BSA) Calculator
Estimate body surface area using standard medical formulas. Supports metric and imperial inputs.
Informational only. BSA is commonly used in medical dosing calculations. Privacy: runs entirely in your browser.
How it works
- Mosteller: √((height(cm) × weight(kg)) ÷ 3600)
- Du Bois: 0.007184 × height(cm)^0.725 × weight(kg)^0.425
- Haycock: 0.024265 × height(cm)^0.3964 × weight(kg)^0.5378
Examples
FAQ
- What is Body Surface Area (BSA)?
Body Surface Area is an estimate of the total external surface area of the human body, commonly expressed in square meters (m²).
- Which BSA formula is most common?
The Mosteller formula is widely used due to its simplicity and good clinical agreement with more complex formulas.
- Why are there multiple formulas?
Different formulas were derived from different population samples and methods. Results are usually similar but not identical.
- Is BSA the same as BMI?
No. BSA estimates body surface area, while BMI estimates weight relative to height to assess body mass category.
- Is this calculator medical advice?
No. It provides mathematical estimates only. For medical dosing or treatment decisions, consult a healthcare professional.