BMI Calculator

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Your Body Mass Index (BMI)

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Normal
Less than 16.0 Severely Underweight
From 16.0 to 18.5 Underweight
From 18.6 to 25.0 Normal Weight
From 25.1 to 30.0 Overweight
From 30.1 to 35.0 Moderately Obese
More than 35.0 Severely Obese

Article Outlines

A Complete Guide to BMI

Numerical value derived from a person’s weight and height, used to assess whether they are underweight, at a healthy weight, overweight, or obese. It is calculated by dividing weight in kilograms by the square of height in meters (kg/m²). While BMI is a simple screening tool, it does not directly measure body fat or account for muscle mass.

What is BMI?

Body Mass Index (BMI) is a numerical measure that helps determine whether a person’s weight is appropriate for their height. It is calculated by dividing a person’s weight in kilograms by the square of their height in meters (kg/m²). BMI is commonly used to classify individuals into categories such as underweight, normal weight, overweight, or obese, which helps identify potential health risks related to body weight.

How BMI Works?

BMI works as a general screening tool that estimates body fat levels based on height and weight. It provides a quick way to assess whether someone may be underweight or overweight, though it does not directly measure body fat or account for muscle mass, bone density, or fat distribution. Despite these limitations, it is widely used by healthcare professionals to identify possible health issues and guide further evaluations.

How to Maintain a Normal BMI?

Maintaining a normal BMI involves adopting a healthy lifestyle that balances diet and physical activity. Eating a nutritious diet with plenty of fruits, vegetables, whole grains, and lean proteins, while limiting processed foods and sugars, helps manage weight. Regular exercise, such as 30 minutes of moderate activity most days of the week, staying hydrated, getting adequate sleep, and managing stress are also essential for keeping BMI within the normal range (18.5–24.9).

FAQs

While there is no single “average” figure for every individual, the latest National Population Health Survey (NPHS 2024) by the Ministry of Health shows that excess weight is a growing concern among Singapore residents.

According to the survey, 12.7% of residents aged 18 to 74 are obese (BMI of 30.0 or higher), up from 10.5% in 2019–2020, and 22.8% have a BMI of 27.5 or higher, which is in the high-risk range for Asians.

It is important to note that for Asians (including Singaporeans), the healthy BMI range is different from the global standard due to higher risks of diabetes and heart disease at lower weights.

  • Healthy Range (Global/Standard): 18.5 – 24.9

  • Healthy Range (Asian Standard): 18.5 – 22.9

If your BMI is 23.0 or higher, you are generally considered at moderate risk, and 27.5 or higher at high risk, under Singapore’s Health Promotion Board guidelines.