A "good" hemoglobin number depends on your age and sex. Hemoglobin is a protein in red blood cells that carries oxygen throughout your body. Normal ranges vary, but generally:
Normal Hemoglobin Levels
- Adult Males: 13.5–18 g/dL (grams per deciliter), or 120-180 g/L (grams per liter) [Source: Multiple sources, including Mayo Clinic, Healthline, Canadian Blood Services]. Some sources provide a range of 14.0 to 17.5 gm/dL. [Source: Mayo Clinic, Cleveland Clinic]
- Adult Females: 12–15 g/dL, or approximately 120-180 g/L. [Source: Multiple sources, including Mayo Clinic, Healthline, Canadian Blood Services]. Some sources specify a range of 12.3 to 15.3 gm/dL. [Source: Mayo Clinic, Cleveland Clinic]
- Children: Normal ranges vary widely depending on age and sex. [Source: Mayo Clinic]
- Pregnancy: Normal ranges are also different during pregnancy. [Source: Healthline]
Important Note: These ranges are general guidelines. Your doctor will consider your individual health and medical history when interpreting your hemoglobin levels. Variations can be influenced by factors such as altitude, smoking, and overall health. A single test result shouldn't be interpreted in isolation. Consult your physician for personalized interpretation and advice.
The wide range of normal hemoglobin levels reflects individual variation. Several references provide slightly differing ranges, highlighting the importance of physician interpretation rather than self-diagnosis using online information. Always consult a healthcare professional for any health concerns.
