BMI Calculator

A tool to calculate Body Mass Index (BMI) and check your weight status. Enter your height and weight to find out your BMI value and weight category.

Enter Body Information
Enter your body information for accurate BMI calculation
BMI Classification Standards
Underweight< 18.5
Normal Weight18.5 - 24.9
Overweight25.0 - 29.9
Obesity Class I30.0 - 34.9
Obesity Class II35.0 - 39.9
Obesity Class III≥ 40.0
BMI History and Scientific Background

Birth of BMI

BMI (Body Mass Index) was developed in 1832 by Belgian mathematician and statistician Adolphe Quetelet. Originally called the 'Quetelet Index', it was created as a simple tool to assess individual obesity levels.

Application in Modern Medicine

In 1972, American physiologist Ancel Keys first used the term 'Body Mass Index'. WHO adopted BMI as an international standard obesity indicator from 1995, and it has become a basic health assessment tool used by medical professionals worldwide.

Big Data and Population Health

  • Epidemiological research: Analysis of obesity trends in large populations
  • Public health policy: Establishing national obesity prevention programs
  • Insurance industry: Health risk assessment and premium calculation
  • Wearable devices: Real-time health monitoring systems
BMI Limitations and Alternative Indicators

BMI Limitations

  • Muscle mass not considered: Inaccurate for athletes or people with high muscle mass
  • Fat distribution: Cannot distinguish between abdominal and overall obesity
  • Age differences: Does not reflect muscle mass decline in elderly
  • Racial differences: Asians face health risks at lower BMI levels

Complementary Health Indicators

Body Fat Percentage

More accurate obesity assessment by measuring actual fat mass

Waist Circumference

Abdominal obesity assessment to predict cardiovascular disease risk

WHR (Waist-Hip Ratio)

Health risk assessment through body fat distribution patterns

Muscle Mass Index

Sarcopenia diagnosis and body composition assessment

AI and Personalized Healthcare

Machine Learning-Based Health Prediction

Modern AI systems predict individual health risks by combining not only BMI but also genetic information, lifestyle habits, and medical records. Healthcare platforms like Google and Apple are utilizing these technologies.

Wearable Devices and Continuous Monitoring

Smart watches, scales, body composition analyzers, etc. are connected via IoT to collect and analyze health data in real-time. This enables monitoring BMI change trends and providing personalized health advice.

The Future of Precision Medicine

With advances in genomics, microbiome research, and metabolomics, an era is approaching where we can accurately predict optimal individual weight and health management methods. BMI will be utilized as fundamental data for such comprehensive health assessments.

Healthy Weight Management Strategies

Weight Loss Strategies

  • • Caloric deficit: expenditure > intake
  • • Balanced nutrient intake
  • • Regular aerobic exercise
  • • Strength training to increase basal metabolic rate
  • • Adequate sleep and stress management

Weight Gain Strategies

  • • Caloric surplus: intake > expenditure
  • • Increased high-protein food intake
  • • Strength training-focused exercise plan
  • • Frequent small meals
  • • Healthy fats and complex carbohydrate intake

Scientific Approach

  • • Utilize basal metabolic rate (BMR) calculations
  • • Set accurate goals through body composition analysis
  • • Gradual and sustainable changes
  • • Data-driven progress tracking
  • • Professional consultation and regular check-ups

Precautions

  • • Avoid rapid weight changes
  • • Avoid extreme diet methods
  • • Set goals considering individual differences
  • • Customized plans based on health status
  • • Balance mental and physical health