Free BMI calculator supporting metric and imperial units. Instantly calculate your Body Mass Index, see your BMI category (underweight, normal, overweight, obese), view a visual BMI scale, get your healthy weight range, and track your BMI history over time.
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Body Mass Index (BMI) is a measure calculated from your height and weight. It's used as a screening tool to indicate whether you're underweight, normal weight, overweight, or obese.
BMI = weight (kg) / height (m)². For imperial units: BMI = (weight in lbs / height in inches²) × 703.
A BMI between 18.5 and 24.9 is considered normal weight. Under 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.
BMI is a screening tool, not a diagnostic measure. It doesn't account for muscle mass, bone density, age, sex, or ethnicity. Athletes may have a high BMI due to muscle. Always consult a healthcare professional.
Using the BMI Calculator is simple: visit the tool page, enter your data or input into the provided fields, and get instant results. No downloads, installations, or sign-ups are required. The tool runs directly in your web browser for maximum convenience.
Yes, after running your calculation you can copy the results to your clipboard or take a screenshot. The BMI Calculator displays a detailed breakdown so you can easily record or share your numbers. No account is required to use or save results.
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Free BMI calculator supporting metric and imperial units. Instantly calculate your Body Mass Index, see your BMI category (underweight, normal, overweight, obese), view a visual BMI scale, get your healthy weight range, and track your BMI history over time.
NexTool's BMI Calculator is completely free to use with no sign-up required. Your data is processed directly in your browser and never sent to our servers, ensuring complete privacy and instant results.
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