Check your Body Mass Index and find out if you are underweight, healthy, overweight, or obese.
Last Updated: June 2026 | Reviewed by MyFreeAITools Editorial Team
Enter your height and weight to calculate your BMI
The BMI Calculator (Body Mass Index Calculator) is a widely used tool to assess whether your weight is appropriate for your height. It provides a quick health indicator by calculating a ratio between your weight and height.
While BMI does not directly measure body fat, it is an easy and reliable method for identifying if a person falls into categories such as underweight, normal, overweight, or obese. Health professionals often use it as a first step in assessing fitness levels and potential health risks.
Body Mass Index (BMI) is calculated using the following formula:
BMI = Weight (kg) ÷ Height² (m²)
For example, if a person weighs 70 kg and has a height of 1.75 meters:
BMI = 70 ÷ (1.75 × 1.75) = 22.86
A BMI of 22.86 falls within the healthy weight category.
Maintaining a healthy BMI may help reduce the risk of certain health conditions such as heart disease, high blood pressure, type 2 diabetes, and obesity-related complications.
Being underweight can also lead to nutritional deficiencies, reduced immunity, and other health concerns.
BMI should be used as a general screening tool and not as a complete assessment of overall health.
BMI results are provided for informational purposes only and should not be considered medical advice. Consult a qualified healthcare professional for proper health evaluation and guidance.
Body Mass Index (BMI) is a measurement that compares your weight with your height to estimate whether your body weight falls within a healthy range.
BMI is calculated by dividing your weight in kilograms by the square of your height in meters.
BMI is a useful general indicator, but it does not measure body fat directly. Athletes or people with high muscle mass may have a higher BMI without having excess body fat.
Yes, this online BMI calculator is completely free and works on both mobile and desktop devices.
A BMI between 18.5 and 24.9 is generally considered a healthy range for adults.
No. BMI estimates weight status based on height and weight but does not directly measure body fat percentage.
Yes. Athletes may have a higher BMI because of increased muscle mass rather than excess body fat.
Children and teenagers use age-specific BMI percentiles rather than standard adult BMI categories.