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BMI Calculator — Body Mass Index

Calculate your Body Mass Index instantly. Check if your weight is healthy with our free BMI calculator.

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BMI Calculator

Enter your height and weight

What is BMI?

Body Mass Index (BMI) is a measure of body fat based on height and weight. It's a simple calculation used worldwide to categorize people into weight categories: underweight, normal weight, overweight, and obese.

BMI Categories

  • Underweight: BMI less than 18.5
  • Normal weight: BMI 18.5 - 24.9
  • Overweight: BMI 25 - 29.9
  • Obese: BMI 30 or higher

Frequently Asked Questions

How do I calculate my BMI?
Enter your height and weight, then click Calculate BMI. The formula is: BMI = weight(kg) / height(m)²
What is a healthy BMI?
A BMI between 18.5 and 24.9 is considered normal. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.