Body Surface Area

Body Surface Area (BSA) Calculation is a tool that allows you to easily calculate your body surface area (BSA) by simply entering your height and weight. It supports the following calculation methods: Du Bois (standard), Mosteller, Haycock, Gehan & George, Shintani, and Fujimoto.

How to Use

  1. Enter your "Height" and "Weight".
  2. Select a calculation formula: "Du Bois (Standard)", "Mosteller", "Haycock", "Gehan & George", "Shintani", or "Fujimoto".
  3. Your "Body Surface Area (BSA)" will be displayed.

About Body Surface Area (BSA)

What is Body Surface Area (BSA)?

Body Surface Area (BSA) is an indicator representing the total surface area of human skin, widely used in medical, pharmaceutical, and nutritional fields. It's primarily used for the following purposes:

Purposes and Applications of BSA

Application Field Specific Uses
Medicine Calculating dosages for chemotherapy drugs (mg/m²)
Pediatrics Dosage adjustments based on age and physique
Nutrition Estimating Basal Metabolic Rate (BMR)
Dermatology Assessing burn severity (%BSA)

BSA Calculation Methods (Representative Formulas)

  1. Mosteller Formula (Simple and commonly used)
    BSA = √(Height (cm) × Weight (kg) ÷ 3600) (unit: m²)
  2. Du Bois Formula (More accurate but complex)
    BSA = 0.007184 × Height0.725 × Weight0.425

BSA Reference Values (Adults)

Body Type Typical BSA Range (m²)
Petite women Approx. 1.4-1.6
Average adults Approx. 1.6-1.9
Large men Approx. 1.9-2.2

Additional Notes

  • Since BSA considers both height and weight, it's often more reliable than BMI for medication dosing and medical applications.
  • Particularly for children, elderly, and obese patients, using weight alone may lead to incorrect dosages, making BSA-based adjustments recommended.

BSA Calculation Formulas

Body Surface Area (BSA) Calculation Formulas

Below are various formulas for calculating Body Surface Area (BSA), all based on height (cm) and weight (kg).

Du Bois Formula (Standard)

The oldest and most widely used international standard formula.

BSA = 0.007184 × Height0.725 × Weight0.425

Mosteller Formula

Simple calculation, commonly used in clinical settings.

BSA = √(Height (cm) × Weight (kg) ÷ 3600)

Haycock Formula

Designed to be suitable for children, reflecting growth stages.

BSA = 0.024265 × Height0.3964 × Weight0.5378

Gehan & George Formula

Based primarily on adult data, slightly complex but highly accurate.

BSA = 0.0235 × Height0.42246 × Weight0.51456

Shintani Formula

Adjusted for Japanese populations, similar to Du Bois but with different coefficients.

BSA = 0.007358 × Weight0.425 × Height0.725

Fujimoto Formula

Japan-originated formula specifically for Japanese children.

BSA = 0.008883 × Height0.663 × Weight0.444

Formula Comparison (Reference)

Formula Name Characteristics Target Users
Du Bois Standard formula, internationally recognized General
Mosteller Simple calculation, clinically practical Adults/Children
Haycock Higher accuracy for children Primarily children
Gehan & George Accuracy-focused for adults Adults
Shintani Adjusted for Japanese, simplified linear formula Adults
Fujimoto Specialized for Japanese children Children/Infants

Notes

This tool is available for free.

※This program is created and confirm the operation in PHP8.1.22.
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