BMI Calculator
Calculate your Body Mass Index (BMI) easily with our free online calculator. Supports Metric and Imperial units with instant health category feedback.
How to Use
- 1 Select your preferred unit system: Metric (kg/cm) or Imperial (lbs/ft/in)
- 2 Enter your weight and height in the respective input fields
- 3 Optionally enter your age (it doesn't affect the basic BMI calculation but is good for your records)
- 4 Click 'Calculate BMI' to see your result instantly
- 5 Review your BMI number, health category, and where you stand on the visual scale
Use Cases
Quickly determine if your weight is in a healthy range relative to your height.
Track your BMI over time as part of a fitness or weight loss program.
Use it as a preliminary screening tool before discussing with a healthcare professional.
Monitor how changes in body composition affect your overall BMI status.
FAQ
Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight, and obesity in adults.
BMI is a useful general screening tool, but it doesn't directly measure body fat. It might not be accurate for athletes with high muscle mass, pregnant women, or the elderly.
According to WHO: Underweight (< 18.5), Normal weight (18.5–24.9), Overweight (25.0–29.9), and Obese (≥ 30.0).
For Metric: BMI = weight(kg) / height(m)². For Imperial: BMI = (weight(lb) / height(in)²) × 703.
No. All calculations are performed locally in your browser. We do not store or transmit any of your personal data.
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