BMI Calculator — Body Mass Index
Calculate your Body Mass Index instantly. Switch between metric and imperial units. Get a color-coded category badge and your ideal healthy weight range. All calculations are done in your browser.
How to Use the BMI Calculator
- Choose units: Select Metric (kg/cm) or Imperial (lbs/inches).
- Enter your details: Input your weight and height.
- Calculate: Click "Calculate BMI" to see your BMI value, category badge, and ideal weight range.
BMI Categories
- Underweight: BMI less than 18.5
- Normal weight: BMI between 18.5 and 24.9
- Overweight: BMI between 25 and 29.9
- Obese: BMI of 30 or greater
Frequently Asked Questions
What is BMI?
Body Mass Index (BMI) is a measure of body fat based on height and weight. It is calculated by dividing weight in kilograms by the square of height in meters.
Does this calculator support both metric and imperial?
Yes. Click "Metric (kg/cm)" for kilograms and centimeters, or "Imperial (lbs/ft)" for pounds and inches. The calculator automatically adjusts the formula.
What is the ideal weight for my height?
The calculator shows the healthy weight range for your height, corresponding to a BMI between 18.5 and 24.9 — the normal weight range.