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

30kg115kg200kg
100cm175cm250cm

Calculation Method

Du Bois Formula

1916

Classic formula, historical significance

0.007184 × height^0.725 × weight^0.425

Mosteller Formula

1987

Most widely used, simple and accurate

√(height × weight / 3600)

Haycock Formula

1978

Optimized for pediatric and adult use

0.024265 × height^0.3964 × weight^0.5378

Gehan & George Formula

1970

Precise for chemotherapy dosing

0.0235 × height^0.42246 × weight^0.51456

Body Surface Area

1.8097

Du Bois Formula

Interpretation

Normal

Average body surface area

Medical Standard

Clinical Grade

Suitable for medical use

Formula Comparison

Selected Method: Du Bois Formula - Classic formula, historical significance (1916)

Clinical Applications

Chemotherapy

271.5 mg

Standard dosing for many chemo drugs

Cardiac Index

4.5 L/min/m²

Normal cardiac output range

Renal Function

3.13 mL/min

Glomerular filtration rate (GFR)

Burn Assessment

181% TBSA

Total body surface area for burns

Ventilation

7.2 L/min

Minute ventilation estimation

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.

Body Surface Area Calculator

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:

1.
Du Bois Formula (1916):
BSA = 0.007184 x height^0.725 x weight^0.425

A classic and widely used method in clinical research.

2.
Mosteller Formula (1987):
BSA = √((height x weight) / 3600)

Simple, fast, and commonly used for chemotherapy and pediatric dosing.

3.
Haycock Formula (1978):
BSA = 0.024265 x height^0.3964 x weight^0.5378

Optimized for both children and adults.

4.
Gehan & George Formula (1970):
BSA = 0.0235 x height^0.42246 x weight^0.51456

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:

Chemotherapy Dosing: Many cancer medications are dosed based on body surface area to ensure the efficient and safe levels in the body.
Cardiac Index: Calculates the amount of cardiac output per square meter of body surface.
Renal Function (GFR): Adjusting drug dosages according to kidney performance.
Ventilation Rate: Estimates minute ventilation in respiratory therapy.
Burn Assessment: Assess total body surface area involvement with burns (TBSA %).

Why use Our Body Surface Area Calculator?

1.
Medical-Grade Accuracy: - Provides reliable BSA results based on valid BSA formulas.
2.
Compare Multiple Formulas: - Instantly display and compare BSA results based on all major formula standards.
3.
Supports Metric & Imperial: - Access for users globally.
4.
Clinical Insight: - With parameters, relevant to the application you may need, i.e., Chemotherapy dosing, estimating renal function.
5.
Free & Accessible: - Anytime and anywhere, no sign-up required.

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.