1. What is Body Mass Index (BMI)?

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 index of weight-for-height that is commonly used to classify underweight, normal weight, overweight, and obesity.

2. How Does the Calculator Work?

The calculator uses the BMI formula:

Where:

• \( peso \) — Weight in kilograms (kg)
• \( altura \) — Height in meters (m)

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 is widely used as a screening tool to identify possible weight problems in adults. While it doesn't measure body fat directly, research has shown that BMI correlates with direct measures of body fat.

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 without shoes and in light clothing.

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 be accurate for athletes, elderly, pregnant women, or people with high muscle mass as it doesn't distinguish between muscle and fat.

Q3: How often should I check my BMI?
A: For general monitoring, checking every 3-6 months is sufficient unless you're actively trying to change your weight.

Q4: Can children use this calculator?
A: This calculator is designed for adults. Children and teens require age and sex-specific BMI percentile charts.

Q5: What's the difference between IMC and BMI?
A: IMC is the Spanish acronym (Índice de Masa Corporal) for BMI (Body Mass Index) - they represent the same measurement.