BMI Calculator – Check Your Body Mass Index Instantly
BMI Calculator is a free online health tool that helps you calculate your Body Mass Index (BMI) based on your height and weight. BMI is a widely used measurement that helps determine whether a person falls into the underweight, normal weight, overweight, or obesity category.
Simply enter your weight and height, and the calculator instantly calculates your BMI score along with your weight classification and health interpretation. Check your Body Mass Index instantly with our free BMI Calculator. Whether you're tracking fitness goals, planning weight loss, monitoring health, or maintaining a healthy lifestyle, this tool provides fast, accurate, and easy-to-understand results using both metric and imperial measurement systems.
Calculate Your Body Mass Index
Instantly calculate your BMI score to see how your weight correlates with your height.
Healthy Weight Range Calculator
Discover your ideal weight range based on WHO guidelines so you have a target for weight loss or gain.
Benefits of Monitoring BMI
Regularly tracking your BMI helps you stay on top of your general health and identify potential weight-related risks early.
BMI Categories Explained
The World Health Organization (WHO) provides standardized BMI categories for adults. Here is what your score means:
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Normal Weight |
| 25.0 – 29.9 | Overweight |
| 30.0 and Above | Obesity |
Note: Want to calculate your exact age to go with your health assessment? Check out our Age Calculator Tool.
BMI Formula and Examples
If you want to know the math behind our Body Mass Index Checker, the formula is quite simple. It is your weight in kilograms divided by your height in meters squared.
BMI = weight (kg) / [height (m)]²Example: If a person weighs 70 kg and is 1.75 meters tall:
BMI = 70 / (1.75 * 1.75) = 70 / 3.06 = 22.86 (Normal Weight)
Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is a statistical measurement that compares your weight and height to estimate whether you have a healthy body weight for your stature.
How do I calculate BMI?
Enter your height and weight into the BMI Calculator above, and the tool will instantly calculate your BMI score and present your health category.
What is a healthy BMI range?
According to the World Health Organization, a BMI between 18.5 and 24.9 is generally considered a healthy or normal weight range for most adults.
Can I use feet and inches in the BMI Calculator?
Yes. The calculator fully supports both metric (kilograms/centimeters) and imperial (pounds/feet/inches) measurement systems.
Is the BMI Calculator free?
Yes. The BMI Calculator is completely free, secure, and accessible directly from your desktop or mobile browser.