BMI Calculator Online Free
Enter your height and weight in metric or imperial units and see your BMI score and category instantly.
BMI is a screening tool, not a medical diagnosis. It does not account for muscle mass, bone density, or fat distribution. Consult a healthcare professional for personal health advice.
Using This BMI Calculator Online Free
BMI (Body Mass Index) is a number calculated from height and weight. This BMI calculator online free computes it in both metric and imperial units.
The result shows your BMI score and which of the four standard categories it falls into: Underweight, Normal weight, Overweight or Obese.
BMI is a general screening tool only. It does not account for muscle mass, bone density or fat distribution. Consult a doctor for a full health assessment.
What this tool does
How to use it
Enter height
Type your height in cm or feet and inches.
Enter weight
Type your weight in kg or pounds.
Read your BMI
Your score and category appear instantly below.
Questions About Bmi Calculator Online Free
It uses the standard WHO BMI formula: weight (kg) divided by height (m) squared. Results are accurate based on the inputs provided.
The WHO defines Normal weight as a BMI between 18.5 and 24.9. Below 18.5 is Underweight. 25 to 29.9 is Overweight. 30 or above is Obese.
BMI is less accurate for athletes with high muscle mass. A muscular person may have a high BMI without excess body fat. Body fat percentage is a better measure for athletes.
The calculation is the same but the interpretation can differ. Some health guidelines use slightly different ranges for men and women.
This calculator uses adult BMI thresholds. For children and teenagers, age-specific growth charts are more appropriate.