Enter your height and weight to instantly calculate your Body Mass Index and weight category.
Body Mass Index (BMI) is a widely used screening tool that estimates whether your weight is healthy relative to your height. This calculator supports both metric (kg/cm) and imperial (lb/ft-in) units and shows your result alongside the standard weight category instantly.
All calculations happen locally in your browser — your health information is never uploaded or stored anywhere.
For most adults, a BMI between 18.5 and 24.9 is considered a normal, healthy weight range. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is considered obese.
BMI is a general screening tool and doesn't account for muscle mass, bone density, or body composition. Athletes and very muscular individuals may show a higher BMI despite having low body fat. Consult a healthcare professional for a full assessment.
No. All calculations happen locally in your browser using JavaScript. Nothing is sent to or stored on a server.
Metric: weight (kg) divided by height (m) squared. Imperial: weight (lb) divided by height (inches) squared, multiplied by 703.