Height tool
BMI calculator
Calculate body mass index from height and weight, with metric and feet/inches units.
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BMI is a quick population-level screening tool. It should not be treated as a full health assessment.
How it works
BMI is calculated as weight in kilograms divided by height in meters squared. The calculator converts feet, inches, and pounds when imperial units are selected, then applies the same BMI formula.
Example
A person who is 180 cm and 75 kg has a BMI of about 23.1, which falls in the common healthy-weight range.
Limitations
BMI is a screening number, not a diagnosis. It does not directly measure muscle, bone mass, body fat distribution, ethnicity, age, pregnancy, or athletic build.
FAQ
What is a healthy BMI?
For many adults, a BMI from 18.5 to 25 is commonly described as the healthy-weight range.
Can BMI be misleading?
Yes. Muscular athletes, older adults, children, pregnant people, and some population groups may need a more specific health assessment.
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