justyourcalculatorBody Surface Area Calculator
Body surface area in square meters, eight formulas side by side.
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Body Surface Area Calculator
BSA by Mosteller, DuBois and six more formulas
Body surface area (Mosteller)
1.89 m²
DuBois: 1.90 m²
- DuBois
- 1.898 m²
- Haycock
- 1.895 m²
- Gehan and George
- 1.901 m²
- Boyd
- 1.897 m²
- Fujimoto
- 1.847 m²
- Takahira
- 1.914 m²
- Schlich (men)
- 1.82 m²
W = weight in kg, H = height in cm. Average adult BSA is about 1.9 m² for men and 1.6 m² for women. For dosing, follow your clinical protocol's formula.
| Formula | Equation | BSA |
|---|---|---|
| Mosteller | √(H × W / 3600) | 1.893 m² |
| DuBois | 0.007184 × W^0.425 × H^0.725 | 1.898 m² |
| Haycock | 0.024265 × W^0.5378 × H^0.3964 | 1.895 m² |
| Gehan and George | 0.0235 × W^0.51456 × H^0.42246 | 1.901 m² |
| Boyd | 0.0003207 × H^0.3 × grams^(0.7285 - 0.0188 log grams) | 1.897 m² |
| Fujimoto | 0.008883 × W^0.444 × H^0.663 | 1.847 m² |
| Takahira | 0.007241 × W^0.425 × H^0.725 | 1.914 m² |
| Schlich (men) | 0.000579479 × W^0.38 × H^1.24 | 1.82 m² |
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How the body surface area calculator works
Body surface area is used in medicine to dose chemotherapy and other drugs and to index heart and kidney measurements. Mosteller's formula, the square root of height (cm) × weight (kg) / 3600, is the most common because it's simple and accurate.
DuBois and DuBois (1916) is the classic formula. Haycock was built with children, Fujimoto and Takahira with Japanese adults, and Schlich (2010) uses separate equations for men and women.
Using and checking your result
Published by JustYourCalculator. Check the units and assumptions above, and compare a known example before relying on the output. Calculations use browser arithmetic and may round displayed values.
This tool provides an estimate, not a diagnosis, treatment plan or individualized medical advice. Population formulas may not fit children, pregnancy, athletes or people with health conditions. Discuss health decisions with a qualified clinician.
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