Body Surface Area (BSA) Calculator
Body Surface Area (BSA) Calculator Online – Estimate BSA Easily
Intro
A Body Surface Area (BSA) Calculator is a free online tool that helps you estimate the surface area of your body based on your height and weight. BSA is widely used in medicine, particularly for calculating drug dosages, assessing metabolic rates, and determining appropriate treatment levels for patients. Unlike Body Mass Index (BMI), which only evaluates weight in relation to height, BSA provides a more accurate measure of body size because it accounts for both dimensions together.
Whether you’re a healthcare professional, medical student, or patient interested in understanding your health metrics, the BSA Calculator online makes the process fast, simple, and accurate.
Formula / Working
The most common and widely accepted formula used by the BSA Calculator is the DuBois and DuBois formula (1916): BSA=0.007184×(Weight0.425)×(Height0.725)BSA = 0.007184 \times (Weight^{0.425}) \times (Height^{0.725})BSA=0.007184×(Weight0.425)×(Height0.725)
Where:
- Weight = in kilograms (kg)
- Height = in centimeters (cm)
Other formulas sometimes used include the Mosteller formula and Haycock formula, but the DuBois equation remains a standard reference in healthcare. The calculator applies these formulas instantly, so users don’t have to perform complex math manually.
Step-by-Step Usage
Using the BSA Calculator online is simple and takes less than a minute:
- Open the Body Surface Area Calculator in your browser.
- Enter your height (in cm).
- Enter your weight (in kg).
- Click on the Calculate button.
- Instantly see your BSA value in square meters (m²).
- Use the Reset button if you want to enter new values.
Examples
Example 1:
- Input: Height = 170 cm, Weight = 70 kg
- Formula:
BSA=0.007184×(700.425)×(1700.725)BSA = 0.007184 \times (70^{0.425}) \times (170^{0.725})BSA=0.007184×(700.425)×(1700.725)
- Result: BSA ≈ 1.84 m²
Example 2:
- Input: Height = 160 cm, Weight = 60 kg
- Formula:
BSA=0.007184×(600.425)×(1600.725)BSA = 0.007184 \times (60^{0.425}) \times (160^{0.725})BSA=0.007184×(600.425)×(1600.725)
- Result: BSA ≈ 1.64 m²
Example 3:
- Input: Height = 180 cm, Weight = 80 kg
- Formula:
BSA=0.007184×(800.425)×(1800.725)BSA = 0.007184 \times (80^{0.425}) \times (180^{0.725})BSA=0.007184×(800.425)×(1800.725)
- Result: BSA ≈ 2.00 m²
FAQs
Q1. What is Body Surface Area (BSA)?
BSA is the total surface area of the human body, expressed in square meters. It’s commonly used in medical fields for precise drug dosage calculations.
Q2. Why is BSA important?
BSA provides a more accurate measure of body size than weight or height alone, making it essential for treatments like chemotherapy, medication dosages, and health assessments.
Q3. Which formula does this calculator use?
The calculator typically uses the DuBois and DuBois formula, but other equations such as Mosteller may also be applied depending on context.
Q4. Is the BSA Calculator accurate?
Yes, it applies widely accepted medical formulas. However, exact dosage or treatment should always be confirmed by a healthcare professional.
Q5. Who should use the BSA Calculator?
Doctors, nurses, pharmacists, medical students, and patients who want to better understand their health metrics.