Body Surface Area Calculator
Free online Body Surface Area Calculator.
Calculator
How to Use
- Enter the required values
- Click Calculate to see the result
- Review the detailed output
Formula
Mosteller: BSA = sqrt(height(cm) x weight(kg) / 3600). Du Bois: BSA = 0.007184 x W^0.425 x H^0.725. Result in square meters. Average adult: 1.7-1.9 sq m.
Example Calculations
Adult Male
Input: Height: 180 cm, Weight: 80 kg
Result: BSA: 1.99 sq m (Mosteller)
Adult Female
Input: Height: 165 cm, Weight: 60 kg
Result: BSA: 1.65 sq m (Mosteller)
Child
Input: Height: 120 cm, Weight: 25 kg
Result: BSA: 0.91 sq m (Mosteller)
About This Calculator
Free online body surface area calculator. Calculate instantly in your browser with our easy-to-use tool. No sign-up required.
Our body surface area calculator is free, easy to use, and provides instant results. All calculations are performed in your browser for privacy and speed.
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Frequently Asked Questions
What is BSA?
Body Surface Area in square meters. Used for drug dosing, cardiac output, and kidney function.
How is BSA calculated?
Du Bois: BSA = 0.007184 x weight^0.425 x height^0.725. Mosteller is simpler with similar results.
Why BSA matters in medicine?
Used for chemotherapy dosing, kidney function (GFR), cardiac index, and burn severity.
Average adult BSA?
Men: ~1.9 sq m. Women: ~1.6 sq m.
BSA vs BMI?
BSA measures surface area (sq m) for drug dosing. BMI measures weight-to-height for weight screening.