Full blood count

Haematocrit

Your laboratory may print this as Hct, PCV, Packed cell volume, Hematocrit. Usually reported in %.

On your report

NameHaematocrit

Also printed asHct · PCV · Packed cell volume · Hematocrit

Usual unit%

Reference rangePrinted by your own laboratory. We publish none of our own.

Comparing two results

A change under about 7.8% may be nothing at all

Haematocrit varies within the same healthy person from day to day — for this value, by about 2.8%. So two results can differ without anything having changed. Below roughly 7.8%, a difference is as likely to be ordinary variation as anything else.

This figure is a lower bound, deliberately. The full calculation also includes the variation of the specific machine that ran your sample, which belongs to your laboratory and differs between them. Leaving it out makes the threshold smaller, so this flags changes that may turn out to be nothing — rather than missing ones that matter.

Biological variation figure from the EFLM BVD meta-analysis. Calculated as 2.77 × CV_I.

What MedicaCare AI does with this value

Photograph the report and you get your own haematocrit explained against the range your laboratory printed — plus every other value on the page, and somewhere to ask what you actually want to know.

Try for free See all 46 values

Know someone holding the same report?

WhatsAppLinkedIn

Usually printed alongside it

Haemoglobin Red cell count Mean cell volume Mean cell haemoglobin MCHC White cell count