Health & Fitness calculator
Body Surface Area Calculator
Calculate your body surface area using the DuBois formula.
About the body surface area calculator
The body surface area calculator estimates your BSA using the DuBois formula, used in medical dosing.
How to use this calculator
- 1
Enter weight and height
Enter weight in kg and height in cm.
- 2
View results
See your BSA in square meters.
How the calculation works
BSA = 0.007184 × weight^0.425 × height^0.725 (DuBois formula). Used in medical dosing and burn assessment.
Example: 70 kg, 175 cm: BSA ≈ 1.85 m².
Important health disclaimers
These calculators provide estimates based on population averages. Individual results vary based on genetics, body composition, medical conditions, and medications. Always consult a healthcare provider before starting a new diet or exercise program, especially if you have underlying health conditions.
Understanding body composition metrics
BMI doesn't distinguish muscle from fat. Body fat % is more accurate but depends on measurement technique. TDEE varies day-to-day based on activity. Macro targets are starting points — adjust based on your results, energy levels, and goals. Hydration needs increase with exercise, heat, and altitude.
Important limitations
This tool provides a mathematical estimate based only on the values entered. It does not account for regulations, taxes, lender fees, market conditions, or individual circumstances. Results are for planning purposes only — consult a qualified professional for regulated, medical, financial, or construction decisions.
Frequently asked questions about body surface area calculator
How accurate is the body surface area calculator?+
The calculation follows the displayed formula and retains full numeric precision before formatting the result.
Can I use the result professionally?+
Use it as a planning estimate. Confirm regulated, medical, financial, or construction decisions with a qualified professional.