Advanced Mosteller BSA Calculator

Calculator

Enter height and weight, choose units, and optionally add a dose per m². The result appears above this form after submission.

Example Data Table

Case	Height (cm)	Weight (kg)	Mosteller BSA (m²)	BMI	Sample Dose per m²
Adult A	165	60	1.66	22.04	75
Adult B	172	78	1.93	26.37	50
Pediatric A	130	28	1.01	16.57	30
Adult C	180	95	2.18	29.32	100

Formula Used

Mosteller Formula

BSA (m²) = √((Height in cm × Weight in kg) / 3600)

Additional outputs included

BMI = Weight (kg) / Height (m)²

Normalized BSA = BSA / 1.73

Dose estimate = Dose per m² × Mosteller BSA

Comparison formulas

Du Bois = 0.007184 × Height(cm)^0.725 × Weight(kg)^0.425

Haycock = 0.024265 × Height(cm)^0.3964 × Weight(kg)^0.5378

Gehan-George = 0.0235 × Height(cm)^0.42246 × Weight(kg)^0.51456

How to Use This Calculator

Enter patient height and choose centimeters or inches.

Enter patient weight and choose kilograms or pounds.

Add an optional patient label for record tracking.

Supply age and sex if you want case context shown.

Enter dose per m² if you want a total dose estimate.

Select your preferred decimal precision.

Click Calculate BSA to view results above the form.

Use the CSV and PDF buttons to export the calculation history and report.

FAQs

1) What does BSA mean?

BSA means body surface area. It estimates external body area in square meters and is often used in dosing, indexing, and physiologic assessments.

2) Why use the Mosteller formula?

Mosteller is simple, quick, and widely recognized. It uses only height and weight, making it practical for bedside workflows and routine calculations.

3) Can I use pounds and inches?

Yes. The calculator converts inches to centimeters and pounds to kilograms automatically before applying the formula.

4) Why are other formulas shown too?

Comparison values help you see how Mosteller aligns with Du Bois, Haycock, and Gehan-George for the same body size.

5) Is BMI required for the calculation?

No. BMI is an additional output only. The Mosteller BSA calculation requires height and weight, not BMI.

6) What is normalized BSA?

Normalized BSA divides the calculated BSA by 1.73 m². It helps compare a patient’s size with a common reference body surface area.

7) Can this calculator estimate medication dose?

Yes, if you enter a dose per m². The tool multiplies that value by the Mosteller BSA to estimate a total dose.

8) Does this replace clinical judgment?

No. It supports calculations only. Final dosing and treatment decisions should always be verified within the full clinical context.