BMI Calculator

Calculate your Body Mass Index and discover your healthy weight range

kilograms (kg)
centimeters (cm)
0.0
Normal Weight
Healthy BMI range: 18.5 - 24.9
Underweight
<18.5 Normal
18.5-24.9 Overweight
25-29.9 Obese
>30

Understanding BMI

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = weight (kg) / height² (m²). For most adults, BMI provides a reliable indicator of body fatness and is commonly used to screen for weight categories that may lead to health problems.

BMI Categories

Underweight: BMI less than 18.5
Normal weight: BMI 18.5 – 24.9
Overweight: BMI 25 – 29.9
Obese: BMI 30 or greater

⚠️ Important Limitations

  • BMI does not distinguish between muscle and fat mass
  • It does not account for age, gender, or ethnicity
  • Athletes may have high BMI due to muscle, not excess fat
  • Pregnant women should use different calculations
  • For children, age and gender-specific BMI percentiles are used

BMI is one screening tool, not a diagnostic measure. Consult a healthcare provider for a complete assessment of your health.