Body Surface Area Calculator (BSA)
Clinically calculate your Total Body Surface Area in square meters (m²) using all major standard medical formulas.
Patient Metrics
The Comprehensive Guide to Body Surface Area Calculator
What is a Body Surface Area Calculator?
A Body Surface Area (BSA) Calculator outputs the total surface area of the human body in square meters (m²).
While BMI merely looks at mass, BSA is a far more vital metric used constantly in clinical medicine to calculate safe, precise dosages of high-risk drugs, particularly in oncology (chemotherapy) and pediatrics.
The Mathematical Formula
Biometric calculation utilizing standardized biological and physiological models for Body Surface Area.
Calculation Example
If a patient is exactly 178 cm tall and weighs 72.5 kg:
- 178 × 72.5 = 12905
- 12905 / 3600 = 3.5847
- Square Root of 3.5847 = 1.89 m²
Strategic Use Cases
- Chemotherapy Dosing: Because drug toxicity relies heavily on volume of distribution, toxic drugs are dosed per square meter (e.g., 50mg/m²) rather than flat milligrams.
Frequently Asked Questions
How accurate is this calculator?
Our calculator uses industry-standard formulas to provide the most accurate results possible. However, it should be used for informational purposes only and not as a basis for formal calculations or legal advice.
Is this tool free to use?
Yes, all our calculators are 100% free to use. We do not require any registration, personal information, or subscriptions.
Can I use this on my mobile device?
Absolutely! Our website is fully responsive and optimized for all screen sizes, including smartphones and tablets, so you can calculate on the go.
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