What is the hematocrit? What does it measure?

Question

What is the hematocrit? What does it measure?

Answer 1

The hematocrit measures the amount of fluid in the blood relative to the amount of solid components. normally it is 3 times the hemoglobin. Hemoglobin is the part of the blood that carries oxygen and makes up part of the red blood cell.

Answer 2

A hematocrit is a blood test. Any ideas on what it could measure? (hint: we have white and red blood cells. The hematocrit measures one of them)