BMI Calculator
Calculate your Body Mass Index (BMI) to determine if you're at a healthy weight for your height. BMI is a useful measure of overweight and obesity.
Your BMI Result
25.0
Normal Weight
Underweight
Normal
Overweight
Obese
Extremely Obese
< 18.5
18.5-24.9
25-29.9
30-34.9
≥ 35
How to Use the BMI Calculator
- Select your preferred unit system (Metric or Imperial).
- Enter your weight and height in the appropriate fields.
- Click the "Calculate BMI" button to see your results.
- View your BMI value, category, and personalized health interpretation.
- Use the visual chart to see where your BMI falls within the standard categories.
About BMI
Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. It's an inexpensive and easy-to-perform method of screening for weight categories that may lead to health problems.
BMI Categories:
- Below 18.5: Underweight
- 18.5 - 24.9: Normal weight
- 25.0 - 29.9: Overweight
- 30.0 - 34.9: Obesity (Class 1)
- 35.0 and Above: Extreme Obesity (Class 2 and 3)
BMI Formula
The BMI calculation uses the following formulas:
- Metric: BMI = weight(kg) / height(m)²
- Imperial: BMI = 703 × weight(lb) / height(in)²
Limitations of BMI
While BMI is a useful screening tool, it has several limitations:
- It doesn't distinguish between fat, muscle, and bone mass
- It doesn't account for age, gender, ethnicity, or body composition
- Athletes with high muscle mass may have a high BMI but low body fat
- Elderly individuals may have a normal BMI but low muscle mass
Note: BMI is a screening tool, not a diagnostic tool. Factors such as muscle mass, bone density, overall body composition, and racial and sex differences are not accounted for in BMI calculations. Always consult with a healthcare provider for a comprehensive health assessment.