Body Surface Area Calculator

Body Surface Area Calculator – Accurate & Easy BSA Calculation Tool

Body Surface Area (BSA) is an important measurement used in medical fields to determine drug dosages, medical assessments, and clinical evaluations. Calculating BSA manually can be complex due to various formulas involved. Our Body Surface Area Calculator provides an easy, fast, and accurate way to compute BSA based on height and weight.

What is Body Surface Area (BSA)?

BSA is the total surface area of the human body, usually expressed in square meters (m²). It is a more precise indicator than weight or height alone for determining metabolic mass, which helps in dosing medications like chemotherapy drugs and assessing cardiac index.

Why Calculate BSA?

• Medication dosing: Many drugs require dosing based on BSA to avoid under- or overdosing.
• Medical assessments: Used for calculating cardiac output and renal function.
• Clinical studies: Standardizes physiological variables among different-sized patients.

Common Formulas for BSA Calculation

There are several formulas used to estimate BSA:

• Mosteller formula (simplest and widely used):

  BSA (m²) = sqrt{frac{Height(cm) 	imes Weight(kg)}{3600}}

• Du Bois formula (classic but slightly complex):

  BSA (m²) = 0.007184 	imes Height(cm)^{0.725} 	imes Weight(kg)^{0.425}

• Haycock formula: Similar to Du Bois but more accurate for children.

Our calculator uses the Mosteller formula by default for simplicity and accuracy.

How to Use the Body Surface Area Calculator

1. Enter your height in centimeters or inches.
2. Enter your weight in kilograms or pounds.
3. Choose the preferred formula (Mosteller is default).
4. Click Calculate to get your BSA in square meters (m²).

Real-Life Example

• Height: 170 cm
• Weight: 70 kg
• Calculation using Mosteller formula:

BSA = sqrt{frac{170 	imes 70}{3600}} = sqrt{3.3055} approx 1.82 , m²

Applications of BSA

• Oncology: To dose chemotherapy drugs precisely.
• Nephrology: To assess kidney function relative to body size.
• Cardiology: To evaluate heart function parameters like cardiac index.
• Pediatrics: To adjust medication doses based on child’s body size.

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Why Use Our Online BSA Calculator?

• Fast and easy: No manual calculations required.
• Accurate: Uses trusted formulas for reliable results.
• Multiple units: Supports metric and imperial units.
• Free and accessible: Available 24/7 on any device.

Frequently Asked Questions (FAQ)

Q1: What is a normal BSA range?

A1: Normal adult BSA typically ranges from 1.6 to 2.0 m², depending on body size.

Q2: Can BSA be used for children?

A2: Yes, BSA calculation is very important in pediatrics for accurate dosing.

Q3: Which formula is the best for BSA calculation?

A3: Mosteller formula is the most commonly used for its simplicity and good accuracy.

Q4: Can I use height in feet and inches?

A4: Yes, our calculator supports both metric and imperial units.

The Body Surface Area Calculator is an essential tool for healthcare professionals and patients alike, ensuring accurate measurements for safer and more effective medical care. Try our calculator now for quick, reliable results.