⚖️ BMI Calculator — Body Mass Index
Calculate your Body Mass Index using metric (kg, cm) or imperial (lbs, ft) units. Free BMI calculator with health category breakdown for adults.
Quick Answers
What does BMI Calculator do?
This tool calculates Body Mass Index (BMI) from weight and height, in metric (kg, cm) or imperial (lbs, feet/inches) units. It returns the WHO category: underweight, normal, overweight or obese.
How do I use BMI Calculator?
Pick your unit system (metric or imperial), enter your weight and height. Your BMI appears instantly with its WHO category. This is a screening indicator, not a medical diagnosis.
Who is BMI Calculator for?
Individuals monitoring weight, athletes adjusting training, health professionals doing quick screening, and biology or nutrition students. Not suitable for pregnant women or children.
Is it free and private?
Yes, fully free and no signup. The calculation runs in your browser, no health data is transmitted or stored on our servers.