Calculate your Body Mass Index (BMI) and find out your weight category based on WHO standards. Helps you check essential health-related metrics quickly with clear explanations.
Underweight
0 - 18.5
Normal
18.5 - 25
Overweight
25 - 30
Obese Class I
30 - 35
Obese Class II
35 - 40
Obese Class III
40 - 40+
Body Mass Index (BMI) is a measure of body fat based on height and weight. The formula is: BMI = weight (kg) / height (m)². It's used as a screening tool to identify weight categories.
WHO categories: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese Class I (30-34.9), Obese Class II (35-39.9), Obese Class III (40+). BMI doesn't account for muscle mass or body composition.
Select your unit system (Metric or Imperial).
Enter your weight and height.
View your BMI and health category.
Health calculators