⚖️ BMI Calculator

Calculate your Body Mass Index and see your health category. Metric and imperial units supported.

Calculator
BMI Chart
Applications
Reference
FAQ

BMI Calculator

BMI Chart & Categories

BMICategoryHealth Risk
< 18.5UnderweightMalnutrition risk
18.5 - 24.9Normal weightLow risk
25.0 - 29.9OverweightEnhanced risk
30.0 - 34.9Obese Class IModerate risk
35.0 - 39.9Obese Class IISevere risk
≥ 40.0Obese Class IIIVery severe risk

BMI Applications

FieldUse of BMI
MedicineObesity screening, risk assessment
NutritionDiet planning, malnutrition detection
SportsFitness evaluation
Public HealthPopulation health statistics
InsurancePremium calculation

Reference & Formula

FormulaUnits
BMI = weight (kg) / [height (m)]²kg, cm
BMI = 703 × weight (lb) / [height (in)]²lb, in
Limitations: BMI does not distinguish between muscle and fat mass. Not suitable for children, athletes, pregnant women.
References: WHO, CDC, "Obesity: Preventing and Managing the Global Epidemic" (WHO Report)

Frequently Asked Questions

  • Is BMI accurate? It is a useful screening tool but not a diagnostic of body fat or health.
  • Can BMI be used for children? No, use age-specific percentiles.
  • Does muscle affect BMI? Yes, muscular people may have high BMI but low fat.
  • What is a healthy BMI? 18.5 - 24.9 for adults.
  • How to lower BMI? Healthy diet, regular exercise, medical advice.