1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared. It provides a reliable indicator of body fatness for most people.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Body weight in kilograms (kg)
• \( height \) — Height in meters (m)

Explanation: The formula divides weight by the square of height to account for the relationship between height and body surface area.

3. Importance of BMI for Seniors

Details: While BMI has limitations, it remains a useful screening tool for weight categories in older adults. However, interpretation should consider that muscle mass decreases and body fat increases with age.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For height, 1.75 would represent 1 meter 75 centimeters. All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

Q1: Are BMI ranges different for seniors?
A: Some studies suggest optimal BMI for seniors may be slightly higher (24-29) than for younger adults.

Q2: What are limitations of BMI for elderly?
A: BMI doesn't distinguish between muscle and fat, and may underestimate obesity in seniors with sarcopenia (muscle loss).

Q3: Should seniors aim for different BMI targets?
A: Some research suggests slightly higher BMI may be protective in older adults, but this should be discussed with a doctor.

Q4: What additional measurements help assess senior health?
A: Waist circumference, muscle mass assessment, and physical function tests provide additional important information.

Q5: How often should seniors check their BMI?
A: Every 3-6 months is reasonable for most seniors, or more frequently if undergoing weight changes.