Hematology
Hematocrit
The percentage of your blood volume made up of red cells.
Unit %Typical adult range 40–52 %
What it is
The percentage of your blood volume made up of red cells.
Why it matters
It moves with hemoglobin and acts as a check on it; the two disagreeing usually points to a hydration or sample problem rather than a blood one.
Reading the number
It runs at roughly three times the hemoglobin value. Both are concentrations, so both shift with how hydrated you were.
What moves it
hydrationaltitudepregnancysmoking
When to raise it
Worth mentioning if it moves sharply in either direction.
Also known as
On a report in another language.
A lab report names this analyte in its own language. Vitals Vault recognises each of these and files them all under Hematocrit.
HematócritoHematokritHämatokritHematocritoHématocriteHCT
Catalog entry last updated 2026-08-27. Browse all 165 metrics.