About the Body Surface Area Calculator
The Body Surface Area Calculator estimates a person's total body surface area (BSA) using height and weight. BSA is commonly expressed in square meters (mΒ²) and is used in some medical and clinical calculations.
Unlike BMI, which relates weight to height, BSA considers both measurements to estimate the approximate surface area of the body.
How Does the Body Surface Area Calculator Work?
The calculator uses your height and weight with a mathematical formula to estimate BSA. Several formulas are available, and they can produce slightly different results.
One of the commonly used methods is the Mosteller formula:
| Formula | Units |
|---|---|
| BSA = β[(Height Γ Weight) Γ· 3600] | Height in cm, weight in kg |
Body Surface Area Calculation Example
Suppose a person is 175 cm tall and weighs 70 kg. Using the Mosteller formula:
BSA = β[(175 Γ 70) Γ· 3600]
| Input | Value |
|---|---|
| Height | 175 cm |
| Weight | 70 kg |
| Estimated BSA | Approximately 1.85 mΒ² |
Why Is Body Surface Area Used?
BSA is used in some medical settings because it can provide a different way to relate body size to certain physiological measurements. Healthcare professionals may use BSA as one factor in specific clinical calculations.
BSA should not be interpreted as a measure of body fat, fitness, or overall health.
Body Surface Area vs BMI
| Feature | BSA | BMI |
|---|---|---|
| Uses Height | Yes | Yes |
| Uses Weight | Yes | Yes |
| Main Result | Estimated body surface area | Weight-to-height index |
| Unit | mΒ² | kg/mΒ² |
How to Use the Body Surface Area Calculator
Enter your height and weight into the Body Surface Area Calculator and select the appropriate units if available. The calculator will apply the selected formula and display your estimated BSA in square meters.
Different BSA formulas may give slightly different results, so use the formula required for your particular purpose when a specific clinical method has been provided.
Health Disclaimer
This calculator is provided for general informational and educational purposes only. Its result is an estimate based on the information you enter and should not be considered medical advice, a diagnosis, or a substitute for advice from a qualified healthcare professional. If you have a medical condition, take medication, are pregnant, or have concerns about your health or nutrition, consult a qualified healthcare professional before making decisions based on the result.