BMI Calculator
Calculate your Body Mass Index from height and weight, review your BMI category, and see a healthy weight range with live metric and imperial values.
You are within the healthy range for this height.
Free BMI Calculator for Adults
Use this BMI calculator to estimate your Body Mass Index from height and weight. It helps you understand your BMI category, compare your weight with a healthy range, and quickly convert between metric and imperial measurements.
Instant BMI score
Adjust your height and weight to calculate BMI instantly with a clear score and category.
Healthy weight range
See the approximate healthy weight range for your selected height in kilograms and pounds.
Metric and imperial
Work in centimeters and kilograms while feet, inches, and pounds update automatically.
Copyable summary
Copy your BMI result, category, measurements, and healthy weight range for quick reference.
What is BMI?
BMI, or Body Mass Index, is a common screening measurement that compares body weight with height. It is often used to estimate whether an adult is underweight, in a healthy weight range, overweight, or obese.
The formula is weight in kilograms divided by height in meters squared. This calculator handles the formula for you and also shows matching imperial values for easier reading.
BMI categories
- Below 18.5: underweight.
- 18.5 to 24.9: healthy weight range.
- 25 to 29.9: overweight.
- 30 and above: obese range.
Common uses for this tool
- Calculate BMI from height and weight.
- Check a healthy weight range for your height.
- Compare kilograms with pounds quickly.
- Track general fitness or wellness progress.
- Copy a simple BMI summary for personal records.
Important health note
BMI does not measure body fat directly and does not account for muscle mass, body composition, age, sex, pregnancy, or medical history. Treat the result as a general screening guide and speak with a qualified health professional for personal health advice.