RBC Count

Red cell number and share of blood.

RBC Count: stack of red glass discs on a dark surface
Image generated with AI.

A typical RBC count is about 4.5–5.9 in men and 4.1–5.1 ×10¹²/L in women; hematocrit is about 41–50% in men and 36–44% in women.

Ranges vary by lab.
TestIf lowIf high
RBCAnemia, bleeding, marrow suppressionDehydration, smoking, altitude, polycythemia
HematocritFalls together with hemoglobinFluid loss (hemoconcentration)
Sources
  • Pagana KD et al., Mosby's Diagnostic and Laboratory Test Reference
  • WHO — Haemoglobin concentrations for the diagnosis of anaemia (2011)

General information only; not diagnosis or treatment. Review your results with your clinician.