1. What is BMI?

Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults. This calculator uses the Singapore Heart Foundation's guidelines specifically for women.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

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

Explanation: BMI provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems more objectively with their patients.

3. Importance of BMI Calculation

Details: BMI is an important screening tool for weight categories that may lead to health problems. For Singaporean women, the following categories apply:

• Underweight: BMI < 18.5
• Normal weight: BMI 18.5-22.9
• At risk (overweight): BMI 23-27.4
• Obese: BMI ≥ 27.5

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For height in centimeters, divide by 100 (e.g., 165 cm = 1.65 m). All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why use Singapore-specific BMI categories?
A: Asian populations, including Singaporeans, have higher health risks at lower BMI levels compared to Caucasians.

Q2: What are limitations of BMI?
A: BMI doesn't distinguish between muscle and fat mass, so muscular individuals may be classified as overweight.

Q3: Is BMI different for men and women?
A: The calculation is the same, but health implications may differ. This calculator uses women-specific guidelines.

Q4: How often should I check my BMI?
A: For most adults, checking every 6-12 months is sufficient unless actively trying to lose or gain weight.

Q5: Should pregnant women use this calculator?
A: No, BMI calculations during pregnancy are not meaningful due to expected weight gain.