BMI Calculator

Calculate your Body Mass Index (BMI) and assess your weight status with our easy-to-use BMI calculator

About BMI Calculator

Overview

BMI Calculator helps you determine your Body Mass Index, a widely-used health metric that assesses weight status based on height and weight. This tool supports both metric and imperial units, providing instant results with clear category classifications. Understanding your BMI can be a useful first step in evaluating your overall health, though it should be considered alongside other health indicators.

Features

  • Support for both metric (kg, cm) and imperial (lbs, in) units
  • Live mode for real-time BMI calculation
  • Clear category classification with color coding
  • Standard WHO BMI categories
  • Helpful health information and limitations
  • Completely browser-based - no data uploaded to servers
  • Mobile-friendly responsive design

How to Use

  1. Select your preferred unit system (Metric or Imperial)
  2. Enter your weight in kilograms or pounds
  3. Enter your height in centimeters or feet and inches
  4. Click "CALCULATE BMI" or enable Live Mode for instant results
  5. Review your BMI value and weight category

FAQ

What is BMI and why is it important?

BMI (Body Mass Index) is a numerical value derived from your height and weight. It is used as a screening tool to categorize individuals into weight status groups such as underweight, normal weight, overweight, or obese. While not a perfect measure, it helps identify potential health risks.

Is BMI an accurate measure of health?

BMI is a useful screening tool but has limitations. It does not distinguish between muscle and fat mass, so athletes may have high BMI despite low body fat. It also does not account for age, sex, ethnicity, or body composition. Use BMI as one indicator among many.

What BMI range is considered healthy?

According to the World Health Organization, a BMI between 18.5 and 24.9 is considered normal or healthy weight. Below 18.5 is underweight, 25 to 29.9 is overweight, and 30 or above is classified as obese. These ranges apply to most adults aged 18 and older.

How often should I check my BMI?

For most people, checking BMI every few months is sufficient to track weight trends. If you are actively working on weight management through diet or exercise, monthly checks can help monitor progress. Always combine BMI tracking with other health metrics and professional guidance.