BMILab

BMI Calculator

A free Body Mass Index calculator that turns your weight and height into a screening number using the standard BMI formula. Choose metric (kg, cm) or imperial (lb, in); the tool computes BMI, places it in the World Health Organization adult categories — Underweight, Normal weight, Overweight, and Obesity — and shows the weight band that would land you in the healthy 18.5–24.9 range for your height. Everything runs in your browser and nothing you type is uploaded or stored. BMI is a screening estimate, not a diagnosis. It does not measure body fat directly and ignores muscle mass, frame size, age, and sex, so very muscular or older people can screen misleadingly. Treat the result as a starting point and consult a healthcare professional before making any health, diet, or fitness decision.