BMI Calculator
Body mass index, or BMI, is a simple number from your height and weight. It is a rough screening figure for adults, and it does not measure health by itself.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
BMI is weight in kilograms divided by height in metres, squared.
The ranges shown are the standard adult ones: under 18.5, 18.5 to 24.9, 25 to 29.9, and 30 or more.
Worked example
At 68 in tall and 160 lb, BMI is 24.3, which falls in the range called normal weight.
Questions
Is BMI accurate?
It is a rough guide. It does not tell muscle from fat, and it can read differently with age and body type.
Does this work for children?
No. Children and teens are measured against growth charts for their age, which this does not use.
What should I do with my number?
Use it as one thing to talk over with your doctor, who knows the rest of the picture.
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