| Classification | BMI Range |
|---|---|
| Underweight | < 18.5 |
| Normal | 18.5 – 23.9 |
| Overweight | 24 – 27.9 |
| Obese | ≥ 28 |
The Body Mass Index (BMI) is an internationally used standard for measuring body fatness and health status. It provides a relatively objective parameter obtained from two values: weight and height. This parameter's range is used to assess body mass.
The BMI calculation formula is: weight (kg) ÷ height (m)². For example: A person weighing 70kg and 1.75m tall has a BMI of 70 ÷ (1.75 × 1.75) ≈ 22.9.
To calculate BMI, you first need to know your weight (kilograms) and height (meters). Divide the weight by the square of the height to get the BMI value. This tool supports both metric (centimeters/kilograms) and imperial (feet/pounds) unit systems and converts automatically for you.
BMI values are divided into four levels: Underweight (<18.5), Normal (18.5-23.9), Overweight (24-27.9), and Obese (≥28). This classification is based on Asian adult standards and may have slight variations in different regions and countries.
It is important to note that BMI is only one indicator for assessing overall health. It does not consider factors such as muscle mass, bone density, body fat distribution, and age. Athletes or muscular individuals may have a high BMI but a normal body fat percentage.
Maintaining a BMI within the normal range is crucial for health. Being overweight or obese increases the risk of chronic diseases like cardiovascular disease, diabetes, and hypertension, while being underweight may lead to malnutrition and weakened immunity.
To maintain a healthy BMI, it is recommended to: 1) Eat a balanced diet and control calorie intake; 2) Exercise regularly, at least 150 minutes of moderate-intensity exercise per week; 3) Get adequate sleep; 4) Monitor weight changes regularly; 5) Consult a nutritionist or doctor if needed.