BMI Calculator
Calculate your Body Mass Index instantly with metric or imperial units and see your weight category on a visual gauge.
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No queues, no uploads — results in milliseconds, even on mobile.
Clean interface, dark mode, and no popups — built to beat legacy tools.
What you get
- Metric (kg/cm) and Imperial (lb/in) unit support
- Instant BMI calculation with category badge
- Visual 4-zone gauge (Underweight to Obese)
- Healthy weight range for your height
- 100% client-side, no data leaves your browser
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Frequently asked questions
BMI is calculated by dividing your weight in kilograms by your height in meters squared (BMI = kg / m²). For imperial units, weight in pounds and height in inches are converted automatically.
A BMI between 18.5 and 24.9 is generally considered a healthy weight range for most adults. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is classified as obese.
BMI is a useful general screening tool but doesn't account for muscle mass, bone density, or body composition, so it may be less accurate for athletes, older adults, or pregnant individuals.