Body Surface Area (BSA) Calculator
Calculate BSA using multiple formulas with burn assessment and pediatric calculations
Patient Information
BSA Results
Enter patient information and click Calculate
Burn Assessment Tool (Rule of Nines)
Select affected body areas to calculate total body surface area burned (TBSA%)
Adult (Age ≥ 15)
Pediatric (Age < 15)
Total Body Surface Area Burned
0%
Fluid Resuscitation (Parkland Formula)
Calculate BSA first to estimate fluid requirements
About BSA Formulas
Du Bois & Du Bois (1916)
BSA = 0.007184 × Height^0.725 × Weight^0.425
Most widely used formula
Mosteller (1987)
BSA = √(Height × Weight / 3600)
Simplest and easiest to calculate
Haycock (1978)
BSA = 0.024265 × Height^0.3964 × Weight^0.5378
Good for pediatric patients
Gehan & George (1970)
BSA = 0.0235 × Height^0.42246 × Weight^0.51456
Validated for wide range of body sizes
Boyd (1935)
BSA = 0.0003207 × Height^0.3 × Weight^(0.7285 - 0.0188 × log(Weight))
Complex but accurate formula