BMI Calculator
Enter your height and weight to calculate your body mass index. The result helps you understand how your weight generally compares with your height.
The BMI value shows where your weight generally falls in relation to your height. The healthy weight range estimates the weights corresponding to BMI values between 18.5 and 24.9 for the same height.
How should the result be interpreted?
The BMI value shows where your weight generally falls in relation to your height. The healthy weight range estimates the weights corresponding to BMI values between 18.5 and 24.9 for the same height.
How is BMI calculated?
BMI = Weight in kilograms ÷ height in meters squared.
Formula
- Convert height from centimeters to meters.
- Calculate the square of height in meters.
- Divide weight in kilograms by the squared height.
- Compare the result with commonly used adult BMI ranges.
BMI calculation example
A person who is 175 cm tall and weighs 70 kg has a BMI of approximately 22.86, calculated as 70 ÷ 1.75².
Tips for interpreting your BMI result
- Enter your height in centimeters.
- Enter your weight in kilograms.
- Do not use BMI alone as a medical diagnosis.
Comparisons
Commonly classified as the underweight range.
This is not a diagnosis and should be interpreted alongside overall health and nutritional status.
Commonly classified as the normal weight range.
Body composition and muscle mass can still affect how the result should be understood.
Commonly classified as the overweight range.
Diet, physical activity, waist measurement, and health history should also be considered.
Commonly classified within the obesity range.
A personalized assessment from a healthcare professional may be appropriate.
BMI calculator guide
BMI calculation uses height and weight to provide a general indication of how body weight compares with height. The standard formula divides weight in kilograms by the square of height in meters.
This calculator accepts height in centimeters and automatically converts it to meters before performing the calculation. It then divides the entered weight by the squared height, allowing users to obtain a result without making manual conversions.
The main advantage of BMI is that it is quick, simple, and widely recognized. However, it is not a complete health assessment. It does not directly measure body fat, muscle mass, bone density, fat distribution, age-related differences, or individual medical conditions.
The estimated healthy weight range shows the body weights corresponding to BMI values of 18.5 and 24.9 for the entered height. This range may be useful as a broad reference, but it should not automatically be treated as a personal target weight.
If the result is unexpected, consider factors such as body composition, recent weight changes, nutrition, physical activity, sleep, medication use, pregnancy, and medical history. A qualified healthcare professional can provide a more individualized interpretation.
FAQ
What is BMI?
BMI, or body mass index, is a simple measurement that compares body weight with height.
How is BMI calculated?
Weight in kilograms is divided by the square of height in meters.
Does BMI show my exact health condition?
No. BMI is a general screening measurement and does not directly consider muscle mass, body fat percentage, age, sex, or medical history.
What is considered a healthy BMI range?
For most adults, a BMI between 18.5 and 24.9 is commonly described as the normal weight range.
Is BMI interpreted the same way for children?
No. BMI for children and teenagers is interpreted using age- and sex-specific percentile charts.
Can BMI be misleading for athletes?
Yes. People with high muscle mass may have a higher BMI even when they do not have excess body fat.
How is the healthy weight range calculated?
The square of height in meters is multiplied by BMI values of 18.5 and 24.9 to estimate the lower and upper weight limits.
Should I consult a healthcare professional about my result?
Consulting a qualified healthcare professional is recommended before making health, diet, or treatment decisions based on BMI.
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