Platelet Hematocrit (PCT): normal range and what it means
The fraction of blood volume occupied by platelets.
Normal range
Adult reference range.
- Low< 0.18 %
- Normal0.18 – 0.36 %
- High≥ 0.36 %
What it measures
Plateletcrit, the share of blood volume taken up by platelets. It combines how many you have with how big they are.
What moves it
A function of platelet count and size, so it follows whatever is moving those.
How to bring it into range
A supporting number for the platelet count rather than one to act on directly.
How fast it responds
Seven to ten days.
Also reported as: pct · plateletcrit
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Common questions
- What is a normal Platelet Hematocrit (PCT) level?
- Normal: 0.18 – 0.36 %. Adult reference range.
- What does a high Platelet Hematocrit (PCT) mean?
- A value above the reference band means Platelet Hematocrit (PCT) is outside the range typical for a healthy adult. A single reading is rarely conclusive on its own — what matters is the trend across draws and the other markers around it, which is why HealthOS reads the whole panel together rather than one number at a time.
- How do I improve my Platelet Hematocrit (PCT)?
- A supporting number for the platelet count rather than one to act on directly.
More in Complete Blood Count
Reference ranges are general-population guidance compiled from common clinical laboratories, not a diagnosis. Lab-to-lab ranges differ. Always read your results with your doctor.