Calculate your Body Mass Index (BMI) instantly using metric or imperial units. Check your BMI category and maintain a healthy lifestyle with our free online BMI Calculator.
Yes. Our BMI Calculator is completely free to use. No registration or download is required.
BMI (Body Mass Index) is a simple measurement that estimates whether your weight is appropriate for your height.
BMI is calculated by dividing your weight by the square of your height. Metric formula: weight (kg) ÷ height (m²). Imperial formula: (weight in pounds × 703) ÷ height (inches²).
For adults, a BMI below 18.5 is considered underweight, 18.5–24.9 is normal weight, 25–29.9 is overweight, and 30 or above is classified as obesity.
Yes. The calculator uses the standard BMI formula. However, BMI is only a screening tool and does not directly measure body fat or overall health.
No. All calculations are performed locally in your browser. Your information is never uploaded or stored on our servers.
Yes. The calculator is fully responsive and works on desktop computers, tablets, and modern mobile browsers.