Body surface area calculator
Enter height and weight to get your BSA (Mosteller).
Body surface area (BSA) calculator
Calculate your body surface area (BSA) from your height and weight using the widely used Mosteller formula. BSA is used in medicine to scale drug doses, cardiac output and burns assessment more accurately than weight alone.
Formula
BSA (m²) = √(height cm × weight kg ÷ 3600). Example: 175 cm and 70 kg gives about 1.84 m². The average adult BSA is roughly 1.7 m².
Frequently asked questions
What is BSA used for? Mainly clinical dosing (e.g. chemotherapy), physiology and burns (% of body surface).
Which formula is this? Mosteller — simple and accurate enough for most uses; Du Bois is another common one.