What is BMI, and what is its normal range?
May 23, 2022
Source: Cainiu Health
Dr. Pan Yongyuan
Introduction
BMI standards differ between males and females.
Standard weight for males: (Height in cm − 81) × 70%.
Standard weight for females: Height in cm × 60% (Note: The original text states “70/60%”, but context suggests this is a typographical error; standard formulas use height × 60% for females).
A body weight deviating by more than ±21% from the standard weight is considered outside the acceptable range.
To calculate the degree of overweight: (Actual weight − Ideal weight) ÷ Ideal weight × 100%.
BMI (Body Mass Index) is a numerical value calculated by dividing body weight in kilograms by the square of height in meters. It is one of the world’s most widely accepted standards for assessing human health and evaluating body fatness or leanness. BMI serves as a reliable indicator when determining whether an individual’s weight relative to their height falls within a normal range.
What Is the Normal BMI Range?
The ideal BMI differs slightly between males and females. For men, the standard (ideal) body weight is calculated as: (height in cm − 81) × 70%. For women, it is: (height in cm − 70) × 60%. If actual body weight deviates by more than ±21% from the ideal weight, it is considered outside the healthy range. To calculate overweight percentage: subtract ideal weight from actual weight, divide the result by ideal weight, then multiply by 100 to express it as a percentage.
The Body Mass Index (BMI), also known as the Quetelet Index or simply the weight-for-height index, is the most commonly used metric for assessing body fat levels and overall health status. It is derived by dividing weight (in kilograms) by the square of height (in meters). For adults, the optimal BMI range is 18.5–23.9. If you are overweight or obese, it is advisable to pursue weight loss actively through balanced nutrition—avoiding high-fat, high-calorie foods—and regular physical activity such as swimming, brisk walking, or jogging.
We hope this article has been helpful to you. Wishing you good health and a joyful life!
