What should my haemoglobin level be if I am 18 years old?

Hemoglobin (Hgb) 18 years old is right at the cusp between pediatric and adult. Whether you are female or male also factors in. Average hgb male (age 12-18): 14.5 female (age 12-18): 14.0 adult male: 15.5 adult female: 14.0.