Calculate your BMI (Body Mass Index) instantly. Free online BMI calculator with metric and imperial units — find your healthy weight range.
The Tooloogle BMI Calculator estimates your Body Mass Index from your height and weight, classifies the result against WHO ranges, and shows you the weight range considered healthy for your height. Useful for personal wellness tracking, fitness goal-setting, and quick health checks.
BMI is your weight divided by your height squared:
Metric: BMI = weight (kg) / height (m)2
Imperial: BMI = (weight (lbs) / height (in)2) × 703
Underweight — below 18.5
Normal weight — 18.5 to 24.9
Overweight — 25.0 to 29.9
Obese (Class I) — 30.0 to 34.9
Obese (Class II) — 35.0 to 39.9
Obese (Class III) — 40.0 and above
Metric & imperial — switch between cm/kg and ft+in/lbs.
Healthy weight range — for your height, what weight falls in the 18.5–24.9 BMI range.
Visual gauge — see where your BMI sits on a color-coded scale.
Privacy-first — height and weight are never transmitted.
BMI is a useful screening tool but not a perfect indicator of health. It doesn't distinguish between muscle and fat — very muscular people often classify as “overweight” despite low body fat. It also doesn't account for body composition, fat distribution, age, or ethnicity. Always consult a qualified healthcare professional for personal health advice and use BMI alongside other indicators (waist measurement, body fat percentage, fitness markers).
Personal wellness tracking. Setting realistic fitness goals. Pre-consultation prep before talking to a doctor or trainer. Educational use in health and PE classes. Periodic health audits.
All calculation runs in your browser — your height and weight never reach our servers.
How to Use BMI Calculator - Check Body Mass Index Online
Select your preferred units (cm/kg or ft/lbs) and input your details.
Review your BMI number along with a health status interpretation (e.g., Normal, Overweight).
Calculate your BMI (Body Mass Index) instantly. Free online BMI calculator with metric and imperial units — find your healthy weight range.
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