BMI Calculator

How to Use This BMI Calculator

Choose metric or imperial units, then enter your weight and height. For imperial, enter feet and inches. Click "Calculate BMI" to see your BMI value, category (underweight, normal, overweight, obese), and the healthy weight range for your height. The bar shows where your BMI sits on the scale.

What Is BMI?

Body Mass Index (BMI) is weight in kilograms divided by height in meters squared. It is a simple screening tool for weight categories. It does not measure body fat directly and does not account for age, sex, or muscle mass, so it is a rough indicator. A BMI between 18.5 and 24.9 is generally considered a healthy range for adults.

Frequently Asked Questions

Is BMI accurate for everyone?

BMI is a general screening tool and may not reflect body composition. Athletes with high muscle mass may have a high BMI but low body fat. Older adults may have more body fat at a "normal" BMI. Use it as one of several indicators, not as a sole measure of health.

What units can I use?

You can use metric (kilograms and centimeters) or imperial (pounds, feet, and inches). The calculator converts internally and shows the same BMI and category for either input.

What is the healthy weight range?

The healthy weight range is the range of weights for your height that correspond to a BMI between 18.5 and 24.9. Staying within this range is often associated with lower health risks, but individual factors matter. Consult a healthcare provider for personalized advice.