BMI Calculator Online – Free Body Mass Index Calculator (2026)

Our free online BMI calculator helps you determine your health category instantly. Simply provide your height and weight to find out if you are at an optimal weight for your frame and track your fitness goals effectively.

BMI Calculator

Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults.

Your BMI is

0
Underweight
< 18.5
Normal
18.5 - 25
Overweight
25 - 30
Obese
> 30

Healthy BMI range is between 18.5 and 24.9. Note that BMI does not differentiate between muscle and fat.

Your Body Mass Index (BMI) is a simple but important metric for assessing potential health risks associated with weight.

What is BMI?

BMI (Body Mass Index) is a measure of body fat based on height and weight that applies to adult men and women. It is a simple tool to assess weight health.

BMI Categories

  • Underweight: BMI less than 18.5.
  • Normal: BMI between 18.5 and 24.9.
  • Overweight: BMI between 25 and 29.9.
  • Obese: BMI of 30 or greater.

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