Red blood cell (RBC) count
Quick answer: This test counts the number of red blood cells, which carry oxygen, in your blood. It is usually part of a complete blood count, used to look into anaemia or too many red cells.
- SampleBlood
- TakesAbout 5 minutes
- Before the testNo special preparation is usually needed.
How the test is done
- 1Blood is drawn into a purple-top tube
- 2The tube is mixed gently
- 3An analyser counts the red blood cells
- 4The count is reported in millions per microlitre
What your results can mean
Reading your report
Ranges differ by sex and in pregnancy; some people with thalassaemia trait have a high count with small cells, so discuss your result with your doctor.
If the result is outside the usual range
A low count can point to anaemia from many causes, including blood loss or lack of nutrients. A high count can be seen with dehydration, smoking, lung disease, thalassaemia trait or polycythaemia.
Who usually has this test
Anyone having a routine blood count, and people with anaemia or high haemoglobin.
Risks and aftercare
A small bruise is possible, and there is nothing else to do afterwards.
Names and options
Also called: RBC count, erythrocyte count, red cell count
Listed by the hospital as
- RBC COUNT TOTAL, EDTA BLOOD
Questions about this test
Why is my RBC count high but haemoglobin low?
This pattern is common in thalassaemia trait, where there are many small red cells. Haemoglobin electrophoresis can check for it.
Is the RBC count the same as haemoglobin?
No, the RBC count is the number of red cells, while haemoglobin is the oxygen-carrying protein inside them. Both are part of a CBC.
Can pregnancy lower the RBC count?
Yes, blood volume rises in pregnancy, which dilutes the red cells. Doctors read results with this in mind.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
Get directions ↗IVF Pulse fertility care at Tamara Hospital →
Reception
Waiting area
IVF lab
This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.