BMI Calculator
Use our BMI Calculator to quickly estimate your Body Mass Index (BMI) using your weight and height. Enter your measurements in the units you prefer and get your BMI result along with the corresponding BMI category.
BMI Calculator
Result
BMI: 0.00
Category: —
What Is BMI?
BMI, or Body Mass Index, is a simple measurement that compares a person's weight with their height. It is commonly used as a general screening tool to categorize weight ranges in adults.
BMI Calculation Formula
BMI is calculated by dividing weight in kilograms by height in meters squared.
BMI = Weight (kg) ÷ Height² (m²)
BMI Categories for Adults
| BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Normal weight |
| 25.0 – 29.9 | Overweight |
| 30.0 or higher | Obesity |
How to Use the BMI Calculator
Follow these simple steps to calculate your exact age.
①
Enter your weight.
Enter your current weight in the calculator using the measurement unit that matches your weight.
②
Select Your Weight Unit
Choose the weight unit that matches your entry: Kilograms (kg) or Pounds (lb).
③
Enter Your Height
Enter your current height in the calculator using the measurement unit that matches your height.
④
View Your Result
Your BMI score and corresponding BMI category will appear instantly in the calculator results section.
Why Use a BMI Calculator?
A BMI Calculator provides a quick way to compare your weight with your height. It can be useful when tracking changes in your measurements or understanding the general BMI range associated with your current weight and height.
BMI is only one general screening measurement and should be considered alongside other factors.
BMI Calculation Example
Suppose your weight is 70 kg and your height is 170 cm.
First, convert your height to meters:
170 cm = 1.70 m
Then:
BMI = 70 ÷ (1.70 × 1.70)
BMI = 24.22
A BMI of 24.22 falls within the Normal weight category according to standard adult BMI ranges.
Important Note About BMI
BMI does not directly measure body fat and does not account for factors such as muscle mass, body composition, or fat distribution. Because of these limitations, BMI should be viewed as a general screening measurement rather than a complete assessment of individual health.
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Frequently Asked Questions
Find answers to the most common questions about BMI calculations.
BMI stands for Body Mass Index. It is a measurement that compares weight with height and is commonly used to categorize weight ranges in adults.
For adults, a BMI between 18.5 and 24.9 is generally categorized as normal weight according to standard BMI ranges.
Yes. Our BMI Calculator supports pounds (lb) as a weight unit. You can also enter your height in centimeters, meters, inches, or feet.
Yes. The calculator supports feet and inches as height measurements. Enter your height using the available unit options.
The standard adult BMI formula is the same for men and women. However, BMI does not account for individual differences in body composition.
No. BMI does not directly measure body fat. It is a measurement based on weight and height and does not distinguish between muscle, fat, and other body tissues.
Adult BMI categories should not be applied to children and teenagers in the same way. BMI for children is generally interpreted using age- and sex-specific growth charts.
You do not need to calculate your BMI frequently. It can be used occasionally when tracking changes in weight and height.