Understanding Your BMI of 18.2
A BMI of 18.2 at 5'8" and 120 pounds places you in the “Underweight”category. BMI (Body Mass Index) is a screening tool that estimates body fat based on height and weight. It's calculated by dividing weight in pounds by height in inches squared, then multiplying by 703.
BMI = (120 ÷ 68²) × 703 = 18.2
For your height of 5'8", a healthy weight (BMI 18.5 to 24.9) falls between 122 and 164 pounds. To reach the lower end of the healthy range, you would need to gain approximately 2 pounds.
Keep in mind that BMI is a screening tool, not a diagnostic. It does not account for muscle mass, bone density, age, sex, or body composition. Athletes and muscular individuals often have a high BMI despite being healthy. Always consult a healthcare provider for a complete health assessment.