BMI Calculator
Calculate your Body Mass Index with category, ideal weight range, and body fat estimate. Supports metric and imperial units. Instant result.
About BMI Calculator
Calculate your BMI from your weight and height to see your Body Mass Index score and which WHO category it falls in (Underweight, Normal, Overweight, or Obese). Also shows your healthy weight range for your height, an estimated body fat percentage based on your age and sex, and personalised health context. Supports both metric (kg/cm) and imperial (lb/in) units. BMI is a useful screening tool but does not account for muscle mass or body composition.
Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is your weight in kilograms divided by your height in metres squared. It is a quick screening tool for weight categories.
Is BMI an accurate measure of health?
BMI is a useful screening indicator but does not account for muscle mass, bone density, or fat distribution. Athletes often have high BMI despite being healthy.
What is a healthy BMI?
The WHO classifies 18.5-24.9 as normal weight. Below 18.5 is underweight. 25-29.9 is overweight. 30 and above is obese.
Is it free?
Yes, completely free, no signup required.