Health calculator
What is my BMI?
Body mass index (BMI) compares weight to height to estimate weight categories for adults. Use this calculator to find your BMI and see where you land in standard ranges.
Try the calculator
Switch between metric and imperial units with one click.
BMI formula
Metric: BMI = weight (kg) / height (m)^2. Imperial: BMI = 703 x weight (lb) / height (in)^2. The calculator handles the conversion for you.
Example scenario
A person who is 170 cm tall and weighs 70 kg has a BMI of 24.2, which falls in the normal range. Try your own numbers to see where you land.
What this means
- - Underweight: below 18.5
- - Normal: 18.5 to 24.9
- - Overweight: 25.0 to 29.9
- - Obesity: 30.0 and above
What to do next
If your BMI is outside the normal range, talk with a healthcare professional to interpret it for your body type.
FAQ
What is BMI?
BMI (body mass index) is a screening metric that compares weight to height. It helps estimate if a weight range is under, normal, or over for most adults.
Is BMI always accurate?
BMI is a general guide and does not measure body fat directly. Athletic builds, age, and other factors can affect how BMI should be interpreted.
What is a healthy BMI range?
For most adults, a BMI between 18.5 and 24.9 is considered healthy. Your healthcare provider can give guidance for your specific situation.