What BMI tells you

BMI = weight (kg) ÷ height (m)². In imperial units: 703 × weight (lb) ÷ height (in)². Common adult categories are under 18.5, 18.5–24.9, 25–29.9 and 30 or more.

BMI does not measure body fat and may be misleading for athletes, older adults and children. Use it as a starting point and talk to a health professional about your own situation.