What is the Body Surface Area Calculator?
The body surface area calculator is a free online tool that helps you work out body surface area quickly and accurately. It uses the standard formula Du Bois: BSA = 0.007184 x weight^0.425 x height^0.725 and shows the result instantly as you type, along with a full breakdown so you can see exactly how the answer was reached.
How to use this calculator
- Enter weight and height.
- See your body surface area.
Formula used
Du Bois: BSA = 0.007184 x weight^0.425 x height^0.725Explanation of each input
- Weight (kg) โ the weight used in the calculation.
- Height (cm) โ the height used in the calculation.
Understanding your result
- Body surface area โ the calculated body surface area in m2.
Step-by-step calculation
For the example values 70kg, 170cm:
- Apply the formula:
Du Bois: BSA = 0.007184 x weight^0.425 x height^0.725 - Substitute the values: Du Bois formula
- Result: BSA about 1.81 m2
Worked example
| Inputs | 70kg, 170cm |
|---|---|
| Working | Du Bois formula |
| Result | BSA about 1.81 m2 |
Benefits and practical uses
This calculator saves you time and reduces errors when you need body surface area. It is useful for students, professionals and anyone who wants a fast, reliable answer without manual calculation. Results update instantly, work in your browser and can be copied or shared in one click.
Assumptions and limitations
- Du Bois & Du Bois formula.
Frequently asked questions
Why is BSA used?
Clinicians use BSA to dose certain medicines and assess metabolic needs.
Disclaimer: This calculator provides general estimates for educational purposes only and is not medical advice. Consult a qualified healthcare professional for personal guidance.