Enter your height and weight to see your number, your healthy range, and a straight answer on what it means.
BMI only looks at your height and weight. It can't see how much of your weight is muscle versus fat, where your body stores fat, or how your age affects your build — so it's a useful starting point, not a diagnosis.
A heavily-trained athlete and someone who is sedentary can land on the exact same BMI for very different reasons. Use this number as one data point, not the whole picture.
Once you fill in your height and weight, you'll get a short, honest read on your result here.
The same standard ranges apply to both men and women — the BMI formula doesn't change based on sex. Find your height and weight below to see roughly where you'd land.
Not really. BMI can't tell muscle from fat, so muscular athletes are often classified as "overweight" or even "obese" despite having low body fat. If you train seriously, body fat percentage or waist measurements are more useful indicators than BMI alone.
For most adults, 18.5–24.9 is considered the "normal" range. That said, it's a population-level guideline based on averages — it doesn't account for individual differences like muscle mass, frame size, or ethnicity, so treat it as a general reference rather than a personal target.
The formula and category cut-offs are the same for men and women. But because men and women typically carry different amounts of muscle and store fat differently, the same BMI can represent a different body composition in each — one of BMI's known blind spots.
No — children and teens need age- and sex-specific percentile charts, not the adult formula. Older adults can also be misread by standard BMI, since muscle mass naturally declines with age while the "healthy" range doesn't adjust for that. This calculator is built for adults aged 18 and over.
This calculator is for informational purposes only and does not constitute medical advice. Consult a doctor or dietitian before making major changes to your diet or exercise routine, especially if you have a health condition.