📏 Body Surface Area Calculator
Calculate your body surface area (BSA) using multiple established formulas. BSA is used in medicine for drug dosing and clinical assessments.
What is Body Surface Area?
Body Surface Area (BSA) is the total surface area of the human body. It is used in medicine for calculating drug dosages, fluid requirements, and cardiac index. BSA is considered a more accurate measure than body weight for these purposes.
BSA Formulas
Du Bois: BSA = 0.007184 × weight^0.425 × height^0.725
Mosteller: BSA = √((height × weight) / 3600)
Haycock: BSA = 0.024265 × weight^0.5378 × height^0.3964
Gehan & George: BSA = 0.0235 × weight^0.51456 × height^0.42246
Uses of BSA
- Drug Dosing: Many chemotherapy drugs are dosed based on BSA
- Cardiac Index: Cardiac output is often normalized to BSA
- Fluid Requirements: Burn patients' fluid needs are calculated using BSA
- Glomerular Filtration Rate: GFR is often expressed per 1.73 m² BSA
Average BSA Values:
Adult Men: ~1.9 m²
Adult Women: ~1.6 m²
Adult Men: ~1.9 m²
Adult Women: ~1.6 m²