BSA Calculator – Body Surface Area
Calculate your Body Surface Area (BSA) using multiple validated formulas. BSA is used in clinical settings for medication dosing, chemotherapy, and physiological measurements.
Calculation Method
Selected Formula
BSA (m²) = √( [height(cm) × weight(kg)] / 3600 )
The Mosteller formula is widely used due to its simplicity and accuracy.
Average Male BSA
1.9 m²
Typical for 70kg, 175cm male
Average Female BSA
1.6 m²
Typical for 60kg, 165cm female
Child BSA Range
0.2-1.4 m²
Varies with age and growth
| Method | BSA Value | Accuracy |
|---|---|---|
| Mosteller | - | High (widely used) |
| Du Bois & Du Bois | - | High (historical standard) |
| Haycock | - | High (pediatric focus) |
| Gehan & George | - | Moderate (general use) |
Clinical Applications
- Chemotherapy dosing: Many drugs are dosed based on BSA to maximize efficacy while minimizing toxicity
- Renal function assessment: Glomerular filtration rate (GFR) is often normalized to BSA
- Cardiac index calculation: Cardiac output is frequently indexed to BSA
- Burn assessment: The "Rule of Nines" for burn estimation is based on BSA percentages
Cite this content, page or calculator as:
Appreciate our scientific content creators and cite this page. Your support matters and keeps us motivated!