Hemoglobin is a vital component of your blood. Learn why doctors test your hemoglobin levels during routine blood work and what abnormal results may mean. The reference ranges for hemoglobin concentration in adults are as follows: Men: 14.0-17. Normal hemoglobin levels for an adult male are between 13.8 and 17.2 grams per deciliter (g/dL). For adult females, a hemoglobin count of between 12.1 and 15.1 g/dL is typically considered normal and healthy. 1 Learn what hemoglobin is, how it is tested, and what normal levels are for different age groups. Find out the causes and symptoms of low and high hemoglobin levels, and how to prevent and treat them.