Under
Normal
Over
Obese
BMI is a general indicator and does not account for muscle, bone density, or body composition. For health advice, consult a qualified professional.
Calculate your Body Mass Index in metric or imperial units and see which weight category you fall into.
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cm/kg or ft/in/lb
See your weight range
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Choose metric or imperial units, enter your height and weight, then click Calculate. Your BMI and weight category appear instantly. Completely free.
For most adults a BMI from 18.5 to 24.9 is considered the normal range. Below 18.5 is underweight, 25 to 29.9 is overweight, and 30 or above is obese.
BMI equals weight in kilograms divided by height in metres squared. The imperial formula is 703 times weight in pounds divided by height in inches squared.
BMI is a general guide and does not distinguish muscle from fat. Athletes and some body types may get misleading results, so treat it as a rough indicator.
No. The calculation happens entirely in your browser. Your height and weight are never uploaded — guaranteed privacy.
This calculator uses adult categories. Children and teens use age and sex specific percentiles, so consult a pediatric chart or doctor for them.