Hematocrit
Low accompanies anemia (together with hemoglobin), high often dehydration; interpret within the context of the full blood count.
| Rating | Range | What it means |
|---|---|---|
| Talk to a doctor | below 0.348 L/L | |
| Good | 0.348 – 0.5 L/L | Within the reference range. |
| Talk to a doctor | 0.5 L/L and above |
This marker also has 2 age- or sex-specific range sets in the app — the table shows the general one.
Why it matters
Low accompanies anemia (together with hemoglobin), high often dehydration; interpret within the context of the full blood count.
If it’s low
Low hematocrit accompanies anemia (fewer red blood cells) — like hemoglobin. But it can also be simply the result of overhydration.
If it’s high
High hematocrit means thickened blood — most often dehydration; possibly smoking, altitude or (rarely) polycythemia. Very high increases the risk of clots.
What to do
Read it with hemoglobin (they go hand in hand). Mildly high with dehydration corrects with adequate drinking.
Read together with
Hemoglobin · Red blood cells (RBC) · MCV
Part of the guide: Complete blood count (CBC) →
Articles about this marker
- Complete blood count (CBC): what the basic blood count meansMarker explained
- High red blood cell count, hemoglobin and hematocrit: causes and what to checkComplete blood count (CBC)
This content is for information only and is not a substitute for medical advice. Talk to your doctor about your results.
Your number, not the average
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