Health
BMI Calculator
Calculate your Body Mass Index using metric or imperial units, with WHO category ranges.
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Enter height & weight to see your BMI
kg
cm
BMI Scale · WHO Classification
1018.5253045+
< 18.5
Underweight
Below the healthy weight range
18.5–24.9
Normal weight
Within the healthy weight range
25–29.9
Overweight
Above the healthy weight range
30+
Obese
Significantly above the healthy weight range
What is BMI?
Body Mass Index (BMI) is a simple screening measure calculated from height and weight. Formula: weight(kg) ÷ height²(m). While widely used for population-level screening, BMI does not account for muscle mass, bone density, age, sex, or fat distribution. Use it as one indicator among many — not as a definitive health assessment.
Formula
kg / m²
Ideal Range
18.5–24.9
Measures
Weight status