Body Mass Index Calculator

BMI Formula:

\[ BMI = \frac{weight_{kg}}{(height_{m})^2} \]

Body Mass Index (BMI):

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1. What is Body Mass Index?

Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to adult men and women. It is a simple and widely used screening tool to identify potential weight problems.

2. How Does the Calculator Work?

The calculator uses the BMI formula:

\[ BMI = \frac{weight_{kg}}{(height_{m})^2} \]

Where:

\( weight_{kg} \) — Weight in kilograms
\( height_{m} \) — Height in meters

Explanation: The formula calculates body mass index by dividing weight in kilograms by the square of height in meters.

3. Importance of BMI Calculation

Details: BMI helps assess whether an individual has a healthy body weight for their height. It is used to screen for weight categories that may lead to health problems.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. All values must be valid (weight > 0, height > 0). For accurate results, measure weight and height precisely.

5. Frequently Asked Questions (FAQ)

Q1: What are the BMI categories?
A: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), Obesity (≥30).

Q2: Is BMI accurate for everyone?
A: BMI may not accurately reflect body fat in athletes, elderly, or those with high muscle mass as it doesn't distinguish between muscle and fat.

Q3: Can children use this calculator?
A: This calculator is for adults. Children and teens require age and sex-specific BMI percentiles.

Q4: What are the limitations of BMI?
A: BMI doesn't account for muscle mass, bone density, overall body composition, or racial and sex differences.

Q5: How often should I check my BMI?
A: Regular monitoring (every 3-6 months) can help track weight changes, but focus on overall health rather than just BMI numbers.