Normal Hemoglobin Levels by Age and Sex for Diagnosing Anemia
Normal Hemoglobin Ranges by Age and Sex
- The American Journal of Kidney Diseases recommends normal hemoglobin levels as 13.5-17.5 g/dL for adult males and 12.0-15.5 g/dL for adult females, regardless of age 1, 2, 3
- No downward adjustment is recommended for older males despite lower mean values in elderly 3
- No adjustment is needed for postmenopausal status in adult females 3
- For children and adolescents, normal hemoglobin ranges are:
Factors Affecting Hemoglobin Levels
Altitude Adjustment
- Hemoglobin increases with altitude due to physiological adaptation 1, 2, 6
- Adjustments to normal ranges should be made for patients living at elevations >1,000 meters:
Race/Ethnicity Considerations
- African Americans typically have hemoglobin levels 0.5-1.0 g/dL lower than Caucasians 1, 5, 4
- Mexican Americans show slightly different normal ranges compared to non-Hispanic whites 5, 4