Calculate your BMI
BMI is a quick screening metric based on height and weight. It doesn’t measure body fat directly and can be less accurate for very muscular people or certain body types.
Tip: use the unit toggle that matches what you know.
BMI categories are the same, but context can differ.
BMI categories (adults)
Common BMI ranges used for adults (20+). Always interpret with context.
Underweight
< 18.5
Normal
18.5–24.9
Overweight / Obesity
25–29.9 overweight, 30+ obesity
Important: This page is educational and not medical advice. If you have health concerns, consider talking with a qualified professional.
FAQ
What’s the BMI formula?
US: BMI = (lbs ÷ inches²) × 703. Metric: BMI = kg ÷ meters².
Why can BMI be misleading?
BMI doesn’t measure body fat directly. Some people with high muscle mass may have a higher BMI without high body fat.
What is a “healthy weight range”?
It’s an estimate based on BMI 18.5–24.9 at your height. It’s not a goal for everyone, but it’s a common reference range.