How to use the BMI calculator
- Select Metric or US customary measurements.
- Enter weight and height using the selected units.
- Select Calculate to see your BMI, screening category, and position on the range meter.
Understanding the graphic
The meter shows standard adult screening ranges: underweight below 18.5, healthy 18.5–24.9, overweight 25–29.9, and obesity at 30 or above.
BMI is a population-level screening measure. It does not directly measure body fat, fitness, pregnancy needs, or individual health and is not a diagnosis.
Common questions
Can I use pounds and inches?
Yes. Choose US customary and enter pounds and total inches.
Does NidXee save my health information?
No. The calculation runs locally in your browser.