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Calculate an individualized drug dose from body surface area using the Mosteller formula: BSA (m²) = √(Height(cm) · Weight(kg) / 3600), then Dose = Drug_dose_per_m² × BSA. BSA is the recommended normalization for many cytotoxic and pediatric regimens because drug clearance scales more linearly with BSA than with body weight across patients of different sizes. Also reports the standard adult dose at the reference adult BSA of 1.73 m² for comparison. Valid only for linear drug clearance — BSA dosing does not apply to saturable (Michaelis-Menten) pathways. Not medical advice.
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Tool usage guide
Calculate body surface area (BSA) with the Mosteller formula and estimate a drug dose from a prescribed dose per square meter. Enter height, weight, and dose per m² to receive BSA, individualized dose, and the standard adult comparison at 1.73 m². This calculator is for linear drug clearance models and is not medical advice.
Background
An adult has a height of 170 cm, a weight of 70 kg, and a prescribed drug dose of 200 mg/m².
Problem
Calculate the patient-specific BSA dose and compare it with the reference adult dose.
How to use
Enter height 170, weight 70, dose per m² 200, and select 4 decimal places.
height: 170; weight: 70; dosePerM2: 200; decimalPlaces: 4Outcome
BSA = 1.8181 m² and dose = 363.6237 mg. The standard adult comparison is 346 mg.
Background
A child has a height of 50 cm, a weight of 18 kg, and a prescribed drug dose of 200 mg/m².
Problem
Determine the BSA-based dose for the child and compare it with the reference adult dose.
How to use
Enter height 50, weight 18, dose per m² 200, and select 4 decimal places.
height: 50; weight: 18; dosePerM2: 200; decimalPlaces: 4It uses the Mosteller formula: BSA (m²) = √(height in cm × weight in kg / 3600).
You must enter positive height, weight, and drug dose per m² values. Height is in cm, weight is in kg, and dose is in mg/m².
The dose equals the entered drug dose per m² multiplied by the calculated BSA.
It is the dose calculated using the reference adult BSA of 1.73 m².
No. It is described for linear drug clearance models and does not apply to saturable, Michaelis-Menten pathways. It is not medical advice.
Outcome
BSA = 0.5 m² and dose = 100 mg. The standard adult comparison is 346 mg.