BMI Calculator
Calculate your Body Mass Index (BMI) to check if you're at a healthy weight for your height.
Calculate Your BMI
What is BMI?
Body Mass Index (BMI) is a numerical value calculated from your weight and height. It provides a simple indicator of whether you are underweight, normal weight, overweight, or obese.
BMI Categories:
- Below 18.5: Underweight
- 18.5 - 24.9: Normal weight
- 25.0 - 29.9: Overweight
- 30.0 and above: Obesity
Note: BMI is a general indicator and does not account for muscle mass, bone density, and other factors. For a more comprehensive health assessment, consult with a healthcare professional.
Your BMI Result
Normal weight
You are in the healthy weight range. Maintain a balanced diet and regular physical activity to stay in this range.
BMI Scale
Remember that BMI is just one indicator of health. For a personalized health assessment, consult with a healthcare professional.
How to Use the BMI Calculator
Enter Your Details
Fill in your height and weight. You can choose between metric (cm/kg) or imperial (ft/lbs) units.
Calculate
Click the "Calculate BMI" button to instantly compute your Body Mass Index.
View Results
See your BMI value, weight category, and personalized feedback based on your results.
Understanding BMI
What is BMI?
Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared.
BMI is an inexpensive and easy-to-perform method of screening for weight categories that may lead to health problems.
BMI Categories
| BMI Range | Weight Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Increased risk for some health issues |
| 18.5 - 24.9 | Normal weight | Lowest risk for health issues |
| 25.0 - 29.9 | Overweight | Increased risk for heart disease, high blood pressure |
| 30.0 - 34.9 | Obesity (Class 1) | High risk for health issues |
| 35.0 - 39.9 | Obesity (Class 2) | Very high risk for health issues |
| 40.0 and above | Obesity (Class 3) | Extremely high risk for health issues |
Limitations of BMI
While BMI is a useful tool, it does have limitations. It doesn't distinguish between weight from muscle and weight from fat. As a result:
- Athletes with high muscle mass may have a high BMI without health risks
- Older adults who have lost muscle mass may have a "normal" BMI despite having excess fat
- BMI doesn't account for where fat is stored in the body (abdominal fat carries more health risks)
- BMI ranges may need adjustment for different ethnic groups
For the most accurate health assessment, BMI should be used alongside other measurements like waist circumference, blood tests, and consultations with healthcare professionals.
Related Health Calculators
Calorie Calculator
Estimate daily calorie needs based on activity level.
Ideal Weight Calculator
Calculate your ideal weight based on height, age, and gender.
Body Fat Calculator
Estimate your body fat percentage based on measurements.
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