Body Surface Area Calculator
Estimate body surface area (BSA) from height and weight using the Mosteller formula.
About this tool
Estimate body surface area (BSA) from height and weight using the Mosteller formula — a common reference figure in medicine and physiology research.
Key Features
- Mosteller formula (the most widely cited BSA formula)
- Metric inputs (cm, kg)
- Instant result in square meters
How to Use
- Enter height in centimeters.
- Enter weight in kilograms.
- Click Calculate.
Benefits
- Quick reference figure for physiology or fitness tracking
- Useful context for research or coursework
Frequently Asked Questions
BSA (m²) = √((height in cm × weight in kg) ÷ 3600). It's valued for being simple to compute while staying close to more complex formulas across most adult body sizes, which is why it's the most commonly cited BSA formula.
No — this tool is for general, informational reference only. Body surface area is used clinically to calculate certain drug dosages, but that calculation should always be performed and verified by a qualified healthcare professional using validated clinical tools, not a general web calculator.
Some physiological processes — and some medication dosing in clinical settings — scale more closely with body surface area than with weight alone, since BSA better reflects metabolic rate and processes like heat exchange across the skin.