BMI 18: What It Means and What to Do
A body mass index of 18 places you in the Underweight category according to WHO and CDC standards. The average BMI for US adults is 29.8 (men: 29.4, women: 30.1).
BMI Scale Position
14UnderweightNormalOverweightObese50
Your BMI: 18 — Low BMI may indicate malnutrition or other health issues
BMI Category
Underweight
Healthy BMI Range
18.5–24.9
BMI to Gain to Reach Normal
0.5 BMI