BMI Calculator – Free Body Mass Index Calculator
Calculate your Body Mass Index using the WHO standard BMI formula. Get your weight category instantly with a visual progress indicator.
BMI Formula
BMI = Weight (kg) ÷ Height² (m²)
Example: 70kg ÷ (1.75 × 1.75) = 22.86
BMI Categories (WHO)
Frequently Asked Questions
A healthy BMI is between 18.5 and 24.9 according to WHO standards. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese.
The BMI formula is the same but body composition differs. Women naturally carry more fat at the same BMI value.
Yes. BMI does not distinguish muscle from fat. Athletes may have high BMI despite low body fat. Always consult a doctor for a full health assessment.