BMI
Underweight: BMI < 18.5
Normal weight: 18.5 <= BMI < 24.9
Overweight: 25 <= BMI < 29.9
Obesity (Class I): 30 <= BMI < 34.9
Obesity (Class II): 35 <= BMI < 39.9
Obesity (Class III): BMI >= 40
BMI, or Body Mass Index calculator, is a online BMI measurement tool that assesses an individual’s body composition by considering their height and weight. Its primary purpose is to gauge the amount of body tissue mass.
As per the guidelines of the World Health Organization (WHO), Body Mass Index calculator serves as a widely accepted tool for determining if a person maintains a healthy body weight in relation to their height. Specifically, the calculated BMI value is employed to classify individuals into categories such as,
Depending on where your BMI calculator online falls within predefined ranges the above categories can be defined. These BMI ranges can vary depending on factors like geographical region and age and may include subcategories such as severely underweight or very severely obese. Both being underweight and overweight can have significant impacts on health. Therefore, while Body Mass Index calculator isn’t a flawless measure of ideal body weight, it serves as a valuable indicator for determining the necessity of additional testing or intervention.
To check the suitable Body Mass Index (BMI) categories for you displayed by the calculator, please consult the table below
BMI values for adults | |
Classification | BMI Range- Kg/m2 |
Severe Thinness | < 16 |
Moderate Thinness | 16-17 |
Mild Thinness | 17 – 18.5 |
Normal | 18.5 -25 |
Overweight | 25 -30 |
Obese Class I | 30 – 35 |
Obese Class II | 35 – 40 |
Obese Class III | > 40 |
BMI values for children and teens, aged 2-20 | |
Classification | Percentile Range |
Under Weight | <5% |
Healthy Weight | 5% – 85% |
At risk of overweight | 85% – 95% |
Overweight | >95% |
Here are the formulas utilized to compute BMI in both the International System of Units (SI) and the US customary system (USC).
Weight in Kg and height in meter :
BMI = weight (kg) / (height(m))^2 Kg/m2
Weight in lbs and height in inches:
BMI = 703 × weight (lbs) / height^2 (in) kg/m2
Weight in kg and height in feet and inch:
BMI = Weight (kg) / ((Height (ft) * 0.3048) + (Height (in) * 0.0254))^2 kg/m2
Weight in kg and height in cm:
BMI = Weight (kg) / (Height (cm) / 100)^2 kg/m2
Weight in lbs and height in meter:
BMI = Weight (lbs) * 0.453592) / (Height(m))^2 kg/m2
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