Question
Why does the calculator show more than one BSA formula?
Different clinicians, references, and settings may prefer different formulas. Showing several formulas side by side makes comparison easier.
Fitness
Use OmniCalc's body surface area calculator to estimate BSA from height and weight with several common formulas.
Body surface area calculator
Use height and weight to estimate body surface area with the Mosteller, Du Bois, and Haycock formulas.
Body surface area estimates are often used in medical dosing, burn assessment, and clinical planning where body size matters beyond simple weight alone.
Why this result matters
A clinical body-measurement calculator that estimates BSA from height and weight using multiple common formulas side by side. Use the tool above to enter a few clear inputs and get a practical answer you can use right away.
This body surface area calculator estimates BSA from height and weight using the Mosteller, Du Bois, and Haycock formulas. It is useful for clinical-reference math, medication-dosing context, and body-size comparisons where body surface area is more relevant than weight alone.
Formula and method
The calculator converts height and weight to metric units, then estimates body surface area with the Mosteller, Du Bois, and Haycock formulas.
Example
If someone enters height 170 cm and weight 70 kg, the calculator shows side-by-side BSA estimates from several common formulas.
FAQ
Short answers to the questions people often ask before or after using the tool.
Question
Different clinicians, references, and settings may prefer different formulas. Showing several formulas side by side makes comparison easier.
Question
Mosteller is commonly used because it is simple and practical, but the best formula depends on the context and reference standard being used.
Question
No. BMI is a weight-to-height screening ratio, while BSA estimates the total external body surface area and is used for different clinical and dosing contexts.
Related calculators
If the next question is close to this one, these are the best pages to open next.
Fitness
Use OmniCalc's GFR calculator to estimate kidney filtration from serum creatinine, age, and sex.
Fitness
Use OmniCalc's BMI calculator to estimate body mass index from your height and weight and understand the result clearly.
Fitness
Use OmniCalc's body fat calculator to estimate body fat percentage, fat mass, and lean mass from practical body measurements.
Fitness
Use OmniCalc's healthy weight calculator to estimate a BMI-based healthy weight range from your height.