Calculate your Body Mass Index instantly using metric or imperial units. Find your BMI, weight category, and healthy weight range — free, instant and private.
Did this BMI calculator help you?
Switch between metric (kilograms and centimeters) or imperial (pounds, feet and inches).
Type in your current weight and height in the fields provided.
See your BMI number, weight category and a visual scale showing where you fall immediately.
Everything you need to check your Body Mass Index, all in one free tool.
All calculations run instantly in your browser. Your weight and height are never sent to any server or stored anywhere.
Switch instantly between kilograms/centimeters and pounds/feet-inches, no manual conversion needed.
Instantly see whether your BMI falls into underweight, normal, overweight or obese ranges.
A color-coded scale shows exactly where your result falls compared to standard BMI ranges.
See the healthy weight range for your exact height, based on a normal BMI of 18.5–24.9.
No account, no watermark, no daily limit. Use the BMI calculator as many times as you want, completely free.
Works for adult men and women aged 18 and up using standard WHO BMI thresholds for underweight, normal, overweight and obese ranges.
A clean, distraction-free interface focused purely on getting your BMI result fast, with no pop-ups or intrusive advertising.
This BMI calculator instantly finds your Body Mass Index using either metric or imperial units. Whether you're searching for "BMI calculator," "body mass index calculator," "what is my BMI," or "healthy weight calculator," this tool gives you an accurate result in seconds.
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Normal weight |
| 25.0 – 29.9 | Overweight |
| 30.0 and above | Obese |
BMI is a simple screening tool based only on weight and height. It does not directly measure body fat and can be less accurate for athletes with high muscle mass, older adults, pregnant women, or children. BMI results should be considered alongside other health indicators and discussed with a doctor.
All tools work instantly on your device, private by design.
Divide your weight in kilograms by your height in meters squared. For imperial units, multiply your weight in pounds by 703, then divide by your height in inches squared.
A BMI between 18.5 and 24.9 is generally considered a normal, healthy weight range for most adults. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is classified as obese.
No. BMI does not account for muscle mass, bone density, age, sex or body composition. It can be misleading for athletes, older adults, pregnant women and children. Use it as a general screening tool, not a diagnosis.
BMI only uses weight and height, while body fat percentage directly measures the proportion of fat versus lean mass in your body. Someone with high muscle mass can have a high BMI but low body fat.
Yes, completely free with no sign up, no watermark and no limit on how many times you can use it.
No. This calculator is private by design. All calculations happen instantly in your browser and no personal health information is ever sent to or stored on any server.