📏 Body Surface Area Calculator
Calculate BSA for drug dosing and clinical use
Body Surface Area (Average)
1.82
m²
📋 All Methods (m²)
Du Bois
1.810
Most Common
Mosteller
1.818
Simple
Haycock
1.826
Pediatric
Gehan-George
1.831
Boyd
0.029
Average
1.818
💊 Clinical Applications
Chemotherapy Dosing
Most cytotoxic drugs are dosed per m². Example: If drug is 15 mg/m², dose = 15 × 1.82 = 27.3 mg
Cardiac Index
CI = Cardiac Output ÷ BSA. Normal: 2.5-4.0 L/min/m²
Burn Assessment
Total body surface area burned (TBSA%) used for fluid resuscitation
Glomerular Filtration
GFR is often normalized to 1.73 m² BSA for comparison
📐 Formulas
Du Bois (1916)
BSA = 0.007184 × H^0.725 × W^0.425Mosteller (1987)
BSA = √(H × W / 3600)Haycock (1978)
BSA = 0.024265 × H^0.3964 × W^0.5378H = height in cm, W = weight in kg