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
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you perform quick utility operations directly in your browser. It runs entirely in your browser without sending data to a server.
You can use this tool when handling simple tasks without installing additional software. The results should be interpreted as a processed output based on your input data.
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.