Updated
Health
Body Surface Area Calculator
Calculate body surface area (BSA) in m² using Mosteller, Du Bois, Haycock, Gehan & George, and Boyd formulas, compare results, estimate mg/m² dosing totals, and model target weight for a goal BSA.
BSA (m²), Dose per m² & Target Weight Estimator
Enter height and weight once, calculate BSA across common formulas, convert a dose per m² into a total dose estimate, and plan targets with transparent assumptions.
BSA is an estimate derived from height and weight. Different formulas can give slightly different results, especially at extremes of body size. For dosing, follow the formula and rounding rules required by your local guideline or prescription.
This is a math helper for converting dose per m² into a total amount using BSA. Medication dosing must follow clinical protocols, safety checks, and professional verification.
This tab finds an approximate weight that would produce your goal BSA at your height for the selected formula. It is a mathematical inversion and is not a health recommendation.
If your workflow requires a specific formula, use it consistently. When comparing, focus on how much formulas diverge for your body size, because that is the practical impact on any per-m² calculation.