Body Surface Area Calculator - Medical Grade BSA Calculations
Calculate Body Surface Area using multiple validated formulas for medical dosing, clinical assessment, and research applications.
Measurements
Calculation Method
Du Bois Formula
Classic formula, historical significance
Mosteller Formula
Most widely used, simple and accurate
Haycock Formula
Optimized for pediatric and adult use
Gehan & George Formula
Precise for chemotherapy dosing
Body Surface Area
1.8097 m²
Interpretation
Normal
Medical Standard
Clinical Grade
Formula Comparison
Clinical Applications
Chemotherapy
Standard dosing for many chemo drugs
Cardiac Index
Normal cardiac output range
Renal Function
Glomerular filtration rate (GFR)
Burn Assessment
Total body surface area for burns
Ventilation
Minute ventilation estimation
Related & Other Popular Calculators, Tools
The Body Surface Area Calculator allows you to quickly and accurately calculate your body surface area (BSA) based on scientifically established formulas such as Du Bois, Mosteller, Haycock, and Gehan & George.
This calculator is for research or clinical usage, for medical clinicians, researchers, and others assessing exact BSA for drug calculations, renal function, and evaluative clinical assessments.

What is Body Surface Area (BSA)?
Body Surface Area (BSA) is the total surface area of the human body expressed in square meters (m²). BSA is a key measurement tool in medicine used to determine dosing accuracy for medication calculations, to estimate metabolic demands, and organ function. Compared to using body weight alone, BSA provides a better estimate of physiological processes, such as blood flow, oxygen uptake, and heat exchange.
How the Body Surface Area Calculator Works
Our Body Surface Area Calculator employs various validated BSA formulas to deliver the greatest accuracy for both clinical and personal purposes. You can enter your weight and height in a metric or imperial measurement, and the tool immediately calculates your body surface area.
You are able to compare results from several body surface area formulas, including:
A classic and widely used method in clinical research.
Simple, fast, and commonly used for chemotherapy and pediatric dosing.
Optimized for both children and adults.
Known for precision in chemotherapy dosing.
Each method provides a different BSA calculation, so you can use the method that is most appropriate for your individual medical or research purposes.
Clinical Applications of BSA Calculation
The body surface calculator is essential in healthcare. Some of the applications of BSA calculation include:
Why use Our Body Surface Area Calculator?
Example:
For a person weighing - 70 kg and 170 cm tall using the Du Bois Formula:-
BSA = 1.8097 m²
The value is average and normal, and reasonable for clinical use based on a normal body surface area.
Whether you are a healthcare practitioner, a researcher, or health-conscious individual; this Body Surface Area Calculator allows you to calculate an accurate and reliable BSA now and compare it to your own body surface area.
Use the Body Surface Area Calculator now to get accurate and precise information regarding your body surface area for clinical dosing, health assessment, and research applications.
FAQs
Generally, the normal average for adults is between 1.6 - 1.9 m². Note: the normal average body surface area is variable depending on height, weight and body composition.
You can calculate BSA manually using the Du Bois Formula:- BSA = 0.007184 x height^0.725 x weight^0.425 OR You can use this body surface area calculator for fast and reliable results.
The Mosteller Formula is widely thought to be the most simple and the most accurate BSA formula for use in practice.
BSA Calculation is important to properly calculate safe dosing of medicines, to assess organ function and for accurate assessment of metabolism.
Yes. The Haycock Formula is specifically designed for pediatric as well as adult calculations of body surface area.
Yes - Because it uses multiple BSA formulas, it is suitable for a broad range of heights and weights as well as body composition, producing very reliable results.