Use this fast and accurate BMI calculator to check your Body Mass Index, understand your BMI category, and estimate a healthy weight range. It supports kilograms and centimeters, as well as pounds and feet.
If you are looking for a reliable body mass index calculator with a clean interface, mobile-first design, and practical interpretation, this page gives you everything in one place.
Enter your height and weight, and the calculator immediately returns your Body Mass Index score and weight category.
Switch between kilograms/centimeters and pounds/feet without losing speed or clarity.
In addition to your BMI score, you get an estimated healthy weight range for your height.
The standard BMI formula in metric units is: BMI = weight (kg) / height (m)^2. Example: if your weight is 72 kg and your height is 1.75 m, your BMI is 72 / (1.75 x 1.75) = 23.5.
In imperial units, BMI can be calculated as: BMI = (weight in lb / height in in^2) x 703. This tool handles both methods automatically so you can focus on understanding the result.
People search for terms like calculate BMI, BMI chart, or healthy BMI range because BMI is one of the quickest screening metrics used in preventive health and nutrition planning.
| BMI Range | Category | General Interpretation |
|---|---|---|
| Below 18.5 | Underweight | Weight is below typical recommendations for height. |
| 18.5 to 24.9 | Healthy weight | Usually associated with lower health risk for many adults. |
| 25.0 to 29.9 | Overweight | May indicate elevated risk; lifestyle adjustments can help. |
| 30.0 to 39.9 | Obesity | Often linked with higher long-term cardiometabolic risk. |
| 40.0 and above | Extremely obese | Very high-risk category requiring medical guidance and close follow-up. |
A BMI calculator is designed for adults and gives a broad estimate, not a diagnosis. Athletes with higher muscle mass can have an elevated BMI while still maintaining a low body fat percentage. Older adults, people with fluid retention, and individuals with specific medical conditions may also need additional measurements.
For the most practical view of health, combine BMI with waist circumference, blood pressure, daily activity, dietary patterns, and lab markers reviewed by your healthcare professional.
Medical disclaimer: this page provides educational information and does not replace professional medical advice, diagnosis, or treatment.
A BMI calculator is a quick tool that uses your height and weight to estimate your Body Mass Index and place it in a standard category.
Yes. It is fully free and works on desktop and mobile without registration.
For many adults, the healthy BMI range is 18.5 to 24.9. Individual targets can vary based on medical history and body composition.
It can show trends over time, especially when used together with waist measurements, strength progress, and energy levels.
Yes. The calculator is designed mobile-first and works smoothly on phones, tablets, and desktop devices.