What is a normal healthy BMI range?
According to the WHO, a normal healthy adult BMI ranges between 18.5 and 24.9 kg/m².
BMI Calculator
The BMI Calculator determines Body Mass Index using your height and weight to assess weight categories established by the World Health Organization (WHO).
Scientific Formula & Exercise Physiology Standards
Equation: Quetelet Index Formula | Peer-Reviewed Source: World Health Organization (WHO) Technical Report Series
BMI = Weight (kg) ÷ [Height (m)]²
BMI calculates the ratio of weight in kilograms to the square of height in meters. For imperial units, weight in pounds is multiplied by 703 and divided by height in inches squared.
Step-by-Step Worked Example: Standard BMI Calculation
- Convert height to meters: 180 cm = 1.80 m
- Square the height: 1.80 × 1.80 = 3.24 m²
- Divide weight by height squared: 75 ÷ 3.24 = 23.15 kg/m²
Calculation Result: BMI = 23.2 (Normal Healthy Weight Range: 18.5 – 24.9)
Clinical Nuances, Limitations & Best Practices
- Does not distinguish between muscle mass and fat tissue.
- May overestimate adiposity in muscular athletes and bodybuilders.
- May underestimate fat in elderly individuals with sarcopenia.
Frequently Asked Questions (BMI Calculator)
Is BMI accurate for weightlifters?
BMI does not differentiate between lean muscle and adipose tissue, so muscular individuals often register as overweight despite low body fat.
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