What is the BMI Calculator?

The BMI (Body Mass Index) Calculator is a simple, free, and effective online tool that helps you determine your body mass index based on your height, weight, age, and gender. It supports both metric and imperial units, and is suitable for adults and children alike. The calculator categorizes your BMI into recognized health ranges, providing quick insight into your current health status.

How Does the BMI Calculator Work?

Once you enter your weight, height, age, and gender, the calculator computes your BMI using the standard formula: BMI = weight (kg) / height² (m²). For imperial units like pounds and inches, appropriate conversions are applied. Based on your BMI and age, it then classifies your result into standard health categories such as "Normal", "Overweight", or "Obese".

Step-by-Step BMI Calculation

1. Enter Personal Details
   • Gender
   • Age in years and months
2. Input Measurements
   • Weight (Kg or Pounds)
   • Height (Meters, Feet, Inches, or Centimeters)
3. Calculation Process
   • Weight and height are converted to kilograms and meters as needed.
   • BMI is calculated using the standard or imperial formula.
   • BMI category is determined based on your age group (Adult or Child).
   • A color-coded gauge chart visually displays your BMI.

BMI Classification for Adults (Age 18+)

• BMI below 16 – Severely Underweight
• BMI 16 – 18.4 – Underweight
• BMI 18.5 – 24.9 – Normal
• BMI 25 – 29.9 – Overweight
• BMI 30 – 34.9 – Moderately Obese
• BMI 35 – 39.9 – Severely Obese
• BMI 40+ – Morbidly Obese

Features of Our BMI Calculator

• Supports both metric and imperial units
• Works for adults and children (age-based classification)
• Interactive BMI gauge chart with visual feedback
• Responsive design for all device types
• Option to download a detailed PDF report
• Easy edit and reset options for repeated use

Why Use This BMI Calculator?

• Quick and easy health check based on global BMI standards
• Helps you track weight goals and fitness progress
• No login or registration required
• Professional PDF export with your BMI and category

Whether you're starting a new fitness journey, checking your health status, or just curious about your body composition, this BMI Calculator provides a reliable and visually engaging way to monitor your progress.