BMI Calculator interactive tool
Calculator
Body Mass Index (BMI) is weight in kg divided by height in meters squared. It is a screening tool, not a measure of body fat or health.
Result
24.2
Normal
What Is BMI?
Body Mass Index (BMI) is a simple numerical measure that compares your weight to your height. It is widely used by medical professionals and organizations like the WHO as a quick screening tool to categorize individuals into different weight brackets: underweight, normal weight, overweight, and obese. This BMI calculator helps you quickly determine your category.
BMI Categories and Healthy BMI Range
- Underweight: BMI less than 18.5
- Normal weight: BMI 18.5 to 24.9 (This is generally considered the healthy BMI range for most adults.)
- Overweight: BMI 25 to 29.9
- Obese: BMI 30 or greater
Limitations of the BMI Calculator
While BMI is a useful general guideline, it does not directly measure body fat. This means it has significant limitations: athletes with high muscle mass may be classified as "overweight" or "obese" despite having very low body fat percentages. Similarly, older adults who have lost muscle mass might fall into the "normal" range while actually carrying excess body fat. Always consult a healthcare provider for a comprehensive health assessment, as this BMI calculator is a screening tool, not a diagnostic one.
How To Use the BMI Calculator
- Choose your preferred measurement system: metric (kilograms, centimeters) or imperial (pounds, feet/inches).
- Enter your weight and height accurately into the designated fields.
- The BMI calculator will instantly display your Body Mass Index and categorize you as underweight, normal, overweight, or obese.
- Use the Example button to load sample values for a quick demonstration, or Reset to clear all fields and start a new calculation.