BMI Calculator - Complete Guide

Calculate your Body Mass Index (BMI) and understand what your score means for your health.

1 min read

Calculate your Body Mass Index and understand healthy weight ranges.

What is BMI?#

BMI (Body Mass Index) is a screening tool that uses height and weight to estimate body fatness. It's calculated as:

BMI = Weight (kg) / Height (m)²

How to Use#

  1. Enter your weight (kg or lbs)
  2. Enter your height (cm, m, or feet/inches)
  3. View your BMI and category

BMI Categories#

BMI Range Category
Below 18.5 Underweight
18.5 - 24.9 Normal weight
25.0 - 29.9 Overweight
30.0 and above Obese

Understanding Your Results#

Normal Weight (18.5 - 24.9)#

Indicates a healthy weight relative to height. Maintain through balanced diet and regular exercise.

Underweight (Below 18.5)#

May indicate nutritional deficiency. Consult a healthcare provider.

Overweight (25.0 - 29.9)#

Slight health risk increase. Consider lifestyle modifications.

Obese (30.0+)#

Higher health risk. Medical consultation recommended.

BMI Limitations#

BMI doesn't account for:

  • Muscle mass (athletes may have high BMI)
  • Age differences
  • Gender differences
  • Ethnic variations
  • Body composition
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