BMI Calculator
Enter Your Measurements
Your BMI Result
22.5kg/m²
Normal
UnderweightNormalOverweightObesity IObesity II
Healthy weight range (BMI 18.5–24.9)53.5 – 72.0 kg
BMI Calculator – Check Your Body Mass Index Online
BMI Calculator computes your Body Mass Index from height and weight, giving you an instant WHO classification with a color scale. Switch between metric and imperial units, and see the healthy weight range for your height.
Features & Usage Tips
Enter your height and weight in metric or imperial units and get your BMI, category, and healthy weight range instantly — all computed locally in your browser.
Understanding BMI
BMI (Body Mass Index) is calculated with the formula BMI = weight (kg) ÷ height² (m). For example, a person who is 170 cm (1.7 m) tall and weighs 65 kg has a BMI of 65 ÷ 1.7² = 22.5. The WHO uses BMI to screen for weight categories that may lead to health problems, though it does not measure body fat directly.
- Metric Mode: Enter height in centimeters and weight in kilograms; BMI is computed as kg/m².
- Imperial Mode: Enter height in feet and inches and weight in pounds; the tool converts automatically.
- Color Scale: A visual bar locates your BMI across the WHO categories from underweight to obesity II.
Use Cases
🩺 Health Screening: Quickly assess whether your weight is in a healthy range for your height.
🏃 Fitness Tracking: Monitor BMI changes alongside workouts and diet plans over time.
📋 Medical Checkups: Bring a quick BMI reference to doctor visits or health consultations.
📊 Data & Research: Standardize weight classification in surveys, studies, or personal health logs.
Privacy & Security
This tool runs entirely in your browser. All BMI calculations are performed locally on your device — your measurements are never sent to any server.