BMI Calculator
Calculate Body Mass Index
Formula
BMI = weight(kg) ÷ height(m)²
For imperial: BMI = (weight(lbs) ÷ height(in)²) × 703
BMI Categories
Below 18.5Underweight
18.5 – 24.9Normal weight
25.0 – 29.9Overweight
30.0 – 34.9Obese (Class I)
35.0+Obese (Class II+)
FAQ
What is a healthy BMI?
A BMI between 18.5 and 24.9 is considered normal/healthy for most adults.
Does BMI apply to children?
For children, BMI is interpreted differently using age- and sex-specific percentile charts.