Know your number. Understand your health.
Get a clear BMI estimate, see where it sits on the healthy range, and understand what it means in less than a minute.
A simple number with useful context.
Body mass index compares your weight with your height. It is widely used as a quick screening tool to understand whether your weight may fall within a healthy range.
Explore the BMI chartHow it is calculated
Weight divided by height squared
A screening tool
BMI is a starting point for a health conversation, not a medical diagnosis.
Privacy by design
Your measurements are processed locally and are never saved or shared.
Understand where your BMI sits.
Standard adult BMI categories provide a useful reference for interpreting your result.
BMI has limitations.
BMI does not directly measure body fat, muscle mass, bone density, or how fat is distributed. Athletes and people with higher muscle mass may receive a result that does not reflect their overall health.
Age, sex, ethnicity, pregnancy, and individual health conditions may also affect how a result should be interpreted. A healthcare professional can provide advice based on your complete health picture.
BMI, explained simply.
Is BMI accurate for everyone?
BMI is a useful screening measure, but it does not distinguish between muscle and body fat or account for every difference in body composition.
What is a healthy BMI?
For most adults, a BMI between 18.5 and 24.9 is generally considered within the healthy range.
How often should I check my BMI?
Occasional checks can help you notice broad trends. Day-to-day changes are less meaningful than patterns over time.
Ready to check your BMI?
It takes less than a minute.