BMI Calculator - Body Mass Index for Adults (US & Metric)

Q: What is considered a healthy BMI range?

A BMI between 18.5 and 24.9 is considered the standard healthy weight range for adults, associated with lower risks of cardiovascular disease and type 2 diabetes.

Q: Is BMI accurate for bodybuilders and athletes?

No. BMI does not distinguish between lean skeletal muscle mass and adipose fat tissue. Muscular athletes often register an 'overweight' or 'obese' BMI despite having healthy single-digit body fat levels.

Calculate your Body Mass Index (BMI) and healthy weight range with instant classification.

⚙️ Configuration & Inputs

WeightPounds (lbs)

lbs

HeightInches (5'9" = 69 in)

📊 Results & Analysis

Body Mass Index (BMI)

23.6

Normal Healthy Weight

UnderweightNormalOverweightObese

Healthy Weight Range for Height	125.3 - 168.7 lbs
Underweight Threshold	BMI < 18.5
Normal Weight Threshold	BMI 18.5 - 24.9
Overweight Threshold	BMI 25.0 - 29.9
Obese Threshold	BMI ≥ 30.0

Understanding the Body Mass Index (BMI) Scale

Body Mass Index (BMI) is a screening metric established by the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC) to categorize individuals into weight classifications based on tissue mass and height.

US Customary Formula: BMI = [ Weight (lbs) ÷ Height (inches)² ] × 703
Metric Formula: BMI = Weight (kg) ÷ Height (meters)²

Frequently Asked Questions

A BMI between 18.5 and 24.9 is considered the standard healthy weight range for adults, associated with lower risks of cardiovascular disease and type 2 diabetes.

No. BMI does not distinguish between lean skeletal muscle mass and adipose fat tissue. Muscular athletes often register an 'overweight' or 'obese' BMI despite having healthy single-digit body fat levels.