BMI Calculator – Calculate Your Body Mass Index
Use Metric or US units to calculate your BMI instantly on mobile, tablet, or desktop.
What BMI Means
BMI, or Body Mass Index, is a quick screening tool that compares your height and weight. It can help estimate whether your body weight falls into a healthy range.
- Useful for most adults
- Good for general health screening
- Not a direct diagnosis of body fat or health condition
- Athletes and highly muscular people may get less accurate BMI results
FAQ
What is BMI?
BMI stands for Body Mass Index. It uses your height and weight to estimate whether your body weight is in a healthy range.
How do I calculate BMI?
Metric: weight (kg) ÷ height (m)². US: 703 × weight (lb) ÷ height (in)².
What is a healthy BMI?
For most adults, a BMI between 18.5 and 24.9 is considered within the normal or healthy range.
Is BMI accurate?
BMI is useful as a screening tool, but it does not measure body fat directly and may not fit every body type.
Does BMI work for men and women?
Yes, the same adult BMI categories are commonly used for both men and women.
Can I use BMI for children?
Children and teens usually need age- and sex-specific BMI percentiles rather than the standard adult BMI chart.