How to use the body surface area calculator
Compute body surface area (Mosteller). Enter weight, height in the fields above; the bsa (mosteller), bsa (dubois) are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- w — Weight (kg)
- h — Height (cm)
Worked example
With weight = 70 kg, height = 175 cm, the calculator gives bsa (mosteller) ≈ 1.844662 m²; bsa (dubois) ≈ 1.848143 m².
Frequently asked questions
What is the formula for the body surface area calculation?
BSA (Mosteller) (m²) = √(h × w / 3600). BSA (DuBois) (m²) = 0.007184 × w^0.425 × h^0.725. Here w is weight (kg), h is height (cm).
What inputs do I need for the body surface area calculator?
You need weight in kg, height in cm. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.