BMI Calculator Online Free

Calculate body mass index online with height and weight for quick health reference.

BMI Categories:
Underweight: < 18.5 | Normal: 18.5 - 24.9 | Overweight: 25 - 29.9 | Obese: > 30

What This Tool Does

Calculate your Body Mass Index and healthy weight range instantly.

This BMI calculator computes your Body Mass Index based on your height and weight. BMI is a simple measurement that helps assess whether you're underweight, normal weight, overweight, or obese.

When to Use This Tool

  • Check if your weight is healthy
  • Track fitness progress
  • Calculate healthy weight range
  • Screen for weight-related health risks

How to Use

  • Enter your weight
  • Enter your height
  • View your BMI result

Frequently Asked Questions

What is BMI and what does it measure?
BMI (Body Mass Index) is a calculation using height and weight to estimate body fat. It's calculated as weight in kilograms divided by height in meters squared.
Is BMI accurate for everyone?
BMI has limitations. It may overestimate body fat in athletes and people with muscular builds, and underestimate it in older persons. For a complete health assessment, consult a healthcare professional.
What is a healthy BMI range?
A healthy BMI is generally considered to be between 18.5 and 24.9. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is considered obese.