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, the BMI Calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers. Simply open NexTool in your mobile browser and navigate to the tool — no app download required.
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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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