BMI Calculator
Calculate your Body Mass Index (BMI) from your height and weight and see the corresponding BMI category.
BMI is a screening measure based on height and weight. It does not directly measure body fat or account for every aspect of health.
How the BMI Calculator Works
For metric measurements, BMI = weight in kilograms ÷ height in metres squared.
For imperial measurements, the calculator converts pounds and inches into the equivalent BMI calculation.
How to Use the BMI Calculator
Choose Your Unit System
Choose metric for kilograms and centimetres or imperial for pounds, feet and inches.
Enter Your Measurements
Enter your current weight and height.
Calculate BMI
Select Calculate BMI to see your BMI value and category.
Example BMI Calculation
For a person weighing 70 kg with a height of 170 cm, the BMI is approximately 24.2. Under the standard adult BMI categories used by many health organizations, this falls in the healthy-weight range.
Understanding BMI
BMI is a simple screening measure that relates body weight to height. It can be useful at a population level and as one part of an individual health assessment, but it does not distinguish between muscle and fat or show where body fat is distributed.
BMI categories can also be interpreted differently for children, teenagers, pregnancy and some athletic populations. This calculator is intended for general adult estimates.
Frequently Asked Questions
What is BMI?
BMI, or Body Mass Index, is a ratio of body weight to height used as a general screening measure.
What is a healthy BMI?
For standard adult categories, a BMI from 18.5 to 24.9 is commonly classified as healthy weight.
Does BMI measure body fat?
No. BMI uses height and weight and does not directly measure body-fat percentage or distribution.
Is BMI suitable for everyone?
Standard adult BMI categories are not designed to provide the same interpretation for children, pregnancy and certain other populations.
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