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Health
BMI Calculator
Body mass index and weight category
Runs locally in your browser
Parameters
Results
- BMI
- 22.7
- Category
- Normal
- Normal BMI
- 18.5 – 24.9
How it works
Calculates Body Mass Index (BMI) from height and weight and assigns a standard weight category.
Who it's for: Adults tracking weight trends, patients preparing for a doctor visit, and wellness programs using BMI as a screening tool.
Computes BMI as weight (lb) converted to kg divided by height in meters squared.
Maps the result to CDC/WHO categories: Underweight, Normal, Overweight, or Obese.
Displays the normal BMI reference range of 18.5–24.9.
How to use
- Enter Weight in pounds — use a recent measurement, ideally in the morning before eating.
- Enter Height in inches — measure barefoot without shoes.
- Read BMI — your calculated index rounded to one decimal.
- Check Category to see how your BMI compares to standard cutoffs.
- Compare against Normal BMI (18.5–24.9) for context.
- Discuss results with your doctor if you are near category boundaries or have high muscle mass.
Good to know
- BMI does not distinguish muscle from fat — athletes may read Overweight despite low body fat.
- For children and teens, use CDC growth-chart percentiles rather than adult categories.
FAQ
- Is BMI an accurate health measure?
- BMI is a useful population screening tool but a poor sole metric for individual fitness. Waist circumference and body composition add important context.