1. What is BMI?

Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, normal weight, overweight and obesity in adults. It is calculated by dividing a person's weight in kilograms by the square of their height in meters (kg/m²).

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 calculates body mass per unit of height squared, providing a standardized measure of body composition.

3. Importance of BMI Calculation

Details: BMI is an important screening tool to identify potential weight problems in adults. According to the Singapore Heart Foundation, higher BMI is associated with increased risk of cardiovascular diseases, diabetes, and other health conditions.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For height, you can convert from cm to m by dividing by 100 (e.g., 175 cm = 1.75 m). All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

Q1: What are the BMI categories for Singaporeans?
A: Underweight (<18.5), Normal (18.5-22.9), Overweight (23-27.4), Obese (≥27.5). These thresholds are lower than WHO standards due to higher health risks at lower BMI for Asians.

Q2: Is BMI accurate for everyone?
A: BMI may overestimate body fat in athletes and underestimate it in older people with muscle loss. Waist circumference should also be considered.

Q3: What is a healthy BMI range for Singaporeans?
A: The Health Promotion Board Singapore recommends maintaining BMI between 18.5-22.9 kg/m² for optimal health.

Q4: How often should I check my BMI?
A: Adults should monitor their BMI annually, or more frequently if actively trying to lose or gain weight.

Q5: Where can I get more health advice in Singapore?
A: Visit the Singapore Heart Foundation website or Health Promotion Board for resources on maintaining healthy weight.