Calculate your BMI and see an estimated healthy weight range from your height and weight. Free, instant, US and metric units supported.
BMI is a screening calculation and is not a diagnosis or individualized medical recommendation.
BMI = weight in kilograms ÷ height in meters squared. The calculator converts US units to metric before applying the formula. Standard adult BMI screening categories are under 18.5, 18.5–24.9, 25–29.9 and 30 or higher.
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BMI is a screening measure, not a diagnosis. It does not directly measure body fat and may be less informative for some people, including highly muscular individuals.
Is BMI actually a reliable way to tell if I'm "healthy"?
Not on its own. BMI is a quick screening number based only on height and weight — it doesn't know if you're carrying muscle from lifting or if your body fat is distributed differently than average. Treat it as a starting point, not a verdict, and talk to a doctor for the real picture.
What BMI range counts as "normal"?
The standard adult screening range is 18.5–24.9. Under that is generally labeled underweight, 25–29.9 is overweight, and 30+ is classified as obesity — but again, these are population-level buckets, not a medical exam.
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