PDFandMore24BMI Calculator
Calculate Body Mass Index.
BMI Calculator
Body mass index (BMI) is a screening measure based on adult weight relative to height. Enter weight in kilograms and height in centimeters to see where your BMI lies, its category, and the healthy-weight range estimated for your height.
Adult BMI screening ranges based on NHLBI guidance. BMI does not directly measure body fat and may not reflect health for every person, including some athletes, older adults, children, or pregnant people.
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About BMI Calculator
Body mass index (BMI) is a screening measure calculated from adult weight and height. This calculator shows your BMI, the corresponding screening category, and the standard adult ranges: underweight below 18.5, healthy weight from 18.5 to 24.9, overweight from 25.0 to 29.9, and obesity at 30.0 or higher.
How to use it
- Enter your weight in kilograms.
- Enter your height in centimeters.
- Review your BMI value and category.
- Use the ranges as a screening guide, not as a diagnosis or complete measure of health.
Key Features
- ✓ Shows BMI value
- ✓ Shows adult screening category
- ✓ Displays all BMI category ranges
- ✓ Explains what BMI measures
- ✓ Includes important interpretation limits
Frequently Asked Questions
What does BMI mean?
BMI means body mass index. It is a screening measure based on weight relative to height.
What are the adult BMI categories?
Underweight is below 18.5, healthy weight is 18.5–24.9, overweight is 25.0–29.9, and obesity is 30.0 or higher.
Does BMI directly measure body fat?
No. BMI is a screening measure and does not distinguish fat from muscle or show where fat is stored.
Who should interpret BMI carefully?
Children, pregnant people, older adults, and highly muscular athletes may need additional measures and professional interpretation.