Health & Fitness
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Open toolCalculate your Body Mass Index instantly — metric & imperial, with health tips and ideal weight range.
Body Mass Index — Know your healthy weight range
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BMI Calculator is a free online tool that calculates your Body Mass Index (BMI) instantly in your browser. Enter your height and weight in metric or imperial units to get your BMI score, category, healthy weight range, and personalized health tips. No data is ever sent to any server — everything is calculated locally.
How to use: Select your unit system (metric or imperial), enter your height and weight, then click Calculate BMI. Your BMI score, category, visual gauge, and health information appear instantly.
Enter your height and weight and it calculates your Body Mass Index instantly, along with which general category (underweight, normal, overweight) that number falls into.
It's a quick, widely-used estimate based only on height and weight, so it doesn't account for muscle mass, body composition, or individual differences - useful as a general reference point, not a complete health assessment.