BMI Calculator – Calculate Your Body Mass Index Online
BMI Calculator
Calculate your Body Mass Index (BMI) quickly using your height and weight with our free online BMI Calculator.
Calculate Your BMI
What Is BMI?
BMI stands for Body Mass Index. It is a commonly used screening measure that compares a person's weight with their height.
Our free BMI Calculator calculates BMI using the standard BMI formula and displays the corresponding adult BMI category.
How to Use the BMI Calculator
- Select your preferred unit system.
- Enter your weight.
- Enter your height.
- Click Calculate BMI.
- Your BMI value and category will appear instantly.
BMI Formula
For metric measurements, BMI is calculated using:
For example, if a person weighs 70 kg and is 1.70 meters tall:
BMI ≈ 24.22
Adult BMI Categories
The following categories are commonly used for adults:
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Healthy Weight |
| 25.0 – 29.9 | Overweight |
| 30.0 or higher | Obesity |
Why Use a BMI Calculator?
- Quickly calculate BMI online.
- Check your BMI without manual calculations.
- Supports both metric and imperial measurements.
- Useful for general health and fitness tracking.
- Simple and free to use on mobile and desktop devices.
Frequently Asked Questions
What is a normal BMI?
For adults, a BMI from 18.5 to 24.9 is commonly categorized as healthy weight.
Is BMI the same for everyone?
BMI is calculated using the same basic formula for adults, but BMI alone does not account for factors such as muscle mass, body composition or some health conditions.
Can children use this BMI calculator?
Adult BMI categories should not be used to interpret BMI for children and teenagers. Their BMI is interpreted differently, usually using age- and sex-specific growth charts.
Is this BMI Calculator free?
Yes. This online BMI Calculator is free to use.
Does BMI measure body fat?
No. BMI is a screening measure based on height and weight. It does not directly measure body fat.
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