Body Surface Area Calculator
Calculate your body surface area using the Mosteller formula.
What is Body Surface Area Calculator?
A body surface area (BSA) calculator estimates your total skin surface area using the Mosteller formula, based on height and weight.
BSA is used in medicine to calculate drug dosages, chemotherapy doses, and cardiac output indices.
How does the Body Surface Area Calculator work?
The Mosteller formula is the most widely used BSA estimate.
The calculator also shows the BSA index (BSA divided by weight).
How to use the Body Surface Area Calculator?
- Enter your height and weight.
- The calculator shows your body surface area in square metres.
Example
Try the calculator with your own numbers
- Enter your values in the input fields above.
- Adjust the values to match your situation.
- The result updates instantly as you change the inputs.
Benefits of using the Body Surface Area Calculator
- Understand medical dosage calculations.
- Track body size changes over time.
- Use in fitness and health tracking.
Who should use the Body Surface Area Calculator?
- People tracking their weight, fitness, and daily health numbers.
- Fitness enthusiasts planning workouts, calories, and protein intake.
- Parents monitoring their child's growth and development.
- Anyone preparing for a health check-up or fitness goal.
Tips for getting the most out of the Body Surface Area Calculator
- Use your most recent measurements for the most accurate result.
- Re-check periodically as your weight, age, or activity level changes.
- Treat the result as a guideline, not a medical diagnosis — consult a professional for health decisions.
Frequently Asked Questions
What is a normal BSA?
The average adult BSA is about 1.7 m² for men and 1.6 m² for women.
Why is BSA used for drug dosing?
Many drugs distribute across body surface area, so dosing by BSA is more accurate than by weight alone.
Small daily decisions add up. Use this calculator to track your numbers and make healthier choices with confidence.
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