BMI Calculator - Body Mass Index for Adults (US & Metric)
Calculate your Body Mass Index (BMI) and healthy weight range with instant classification.
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⚙️ Configuration & Inputs
lbs
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 |
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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
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.