Free online utility tool
Check your Body Mass Index (BMI) in Metric or Imperial units. View official weight categories, target healthy weight ranges for your height, and BMI prime scores.
Enter your height and weight. The calculator computes your Body Mass Index (weight in kg / height in meters squared) and shows which standard health category it falls into.
Great shape! Maintain a balanced diet and regular weekly physical activity.
Calculate Body Mass Index (Metric & Imperial), healthy weight range, and Prime index. Yuitility keeps the workflow fast and focused, so you can complete the job without creating an account.
Frequently asked questions about calculation formulas, privacy, and usage.
Generally: below 18.5 is underweight, 18.5-24.9 is normal weight, 25-29.9 is overweight, and 30+ is considered obese, though these thresholds are population-level guidelines, not individual diagnoses.
No — BMI doesn't distinguish muscle mass from fat, so athletes or muscular individuals can register as "overweight" despite low body fat. It's a screening tool, not a precise individual health measure.
Waist circumference, body fat percentage, and waist-to-hip ratio are commonly used alongside BMI for a fuller picture of health risk.
No. All calculations run strictly in your browser memory. Your measurements are 100% private.
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