BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Understand your weight status and health category with our free tool.
Enter your height and weight to see your BMI result here.
Why Use Our BMI Calculator?
Instant Results
Get immediate feedback on your weight status with our fast and responsive calculator.
Medically Standard
Uses the standard WHO (World Health Organization) formulas for adult BMI calculation.
Dual Units
Seamlessly switch between Metric (cm/kg) and Imperial (ft/lbs) units.
Track Health
Use BMI as a starting point to monitor your health journey and weight goals.
Understanding BMI (Body Mass Index)
What is BMI?
Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight, and obesity in adults. It is defined as the weight in kilograms divided by the square of the height in meters (kg/m²).
BMI Categories
Underweight
BMI less than 18.5
Normal Weight
BMI 18.5 to 24.9
Overweight
BMI 25 to 29.9
Obese
BMI 30 or greater
Limitations of BMI
While BMI is a useful screening tool, it does not diagnose the body fatness or health of an individual. Limitations include:
- Muscle Mass: Athletes may have a high BMI because of increased muscularity rather than increased body fatness.
- Age: Older adults may have more body fat than younger adults with the same BMI.
- Gender: Women tend to have more body fat than men for the same BMI.