Health
BMI calculator
Body Mass Index is the fastest general screen for whether your weight is in a standard healthy band for your height. Enter your weight and height in whichever units you use — pounds or kilograms, inches or centimeters — and the calculator returns your BMI, the standard category, and the weight range that corresponds to a healthy BMI for someone your height. BMI is a population screening tool, not a diagnosis: it can't tell muscle from fat, so use it as a starting point for a conversation with a healthcare provider.
Live calculator
Enter your details
Your estimate
Results
The math, plainly
How it works
- 01
Weight is converted to kilograms and height to meters.
- 02
BMI equals kilograms divided by height in meters squared.
- 03
The category bands are the standard adult cutoffs: under 18.5, 18.5–24.9, 25–29.9, and 30+.
Try a real scenario
154 lb at 5'7"
Inputs154 lb, 67 inches
ResultBMI of about 24.1 — healthy weight, with a range of roughly 118–159 lb.