PediaHelper

BSA Calculator using the Mosteller Formula

This BSA calculator uses the Mosteller formula — also searched as Mosteller BSA calculator — to estimate body surface area from height and weight. Useful for chemotherapy, burn fluids, and some drug dosing contexts.

Mosteller formula: BSA (m²) = √((weight in kg × height in cm) / 3600).

Enter weight in kilograms (kg).
Enter height in centimeters (cm).

Confirm formula preference with local protocol before using BSA-based doses.

Mosteller BSA Formula

This calculator uses BSA (m²) = √((height in cm × weight in kg) / 3600). The result is an estimate; use the formula required by the relevant medication, protocol, or specialty.

Frequently Asked Questions

How is body surface area calculated with the Mosteller formula?

Multiply height in centimeters by weight in kilograms, divide by 3600, then take the square root. The result is body surface area in square meters (m²).

Can the Mosteller BSA formula be used for children?

The formula can estimate pediatric body surface area, but the required equation and dosing method should always be confirmed against the medication or institutional protocol.

Is BSA the same as BMI?

No. BSA estimates total body surface area in m², while BMI relates weight to height squared and is used for weight-status screening.

Pediatric eGFR Calculator Bedside Schwartz and CKD-EPI kidney function estimates. Holliday-Segar Fluid Calculator Calculate pediatric maintenance fluid volume and hourly rate. Pediatric Fluid Bolus Calculator Calculate 10 or 20 mL/kg bolus volumes. Pediatric Drug Dose Calculator Search weight-based pediatric medication guidance.