Blood count
Hematocrit
The share of blood made up of red cells — moves with hemoglobin. Lower results are the ones to watch. A common adult reference interval is 35–50 %.
Typical adult range
- Reference interval
- 35–50 %
- Often-cited tighter window
- 38–46 %
Standard adult laboratory reference interval. Your own lab's printed range is the one that applies to your result.
What commonly moves it
- Hemoglobin
- Iron deficiencyLow stores or poor delivery limit red-cell production and thyroid conversion.
These are commonly described physiological relationships, shared for education. They are not a diagnosis and cannot account for your medications, history, or symptoms — discuss your results with a licensed clinician.
Watching Hematocrit over time?
Dose Compass charts each draw, flags meaningful moves, and helps you prepare questions for your clinician.
Start tracking