Blood count · Blood test
MCV blood test: normal range explained
Also printed as: Mean Corpuscular Volume, Mean Cell Volume, M.C.V.
MCV (mean corpuscular volume) is the average size of your red blood cells, measured in femtolitres (fL) as part of a CBC. MedlinePlus prints an adult range of 79–95 fL, NHLBI 80–95 fL and Testing.com 80–98 fL; Indian labs often print a wider range, but the range printed on your own report is the one that applies.
Last updated 4 sources
What is the normal range for MCV?
| Printed for | Range |
|---|---|
| Adults, as MedlinePlus prints it | 79–95fL |
| Adults, as NHLBI prints it | 80–95fL |
| Adults, as Testing.com prints it | 80–98fL |
Reference ranges vary between laboratories. Always use the range printed on your own report. Why ranges differ between labs
Sources:MedlinePlus, NHLBI, Testing.com
What does MCV measure?
MCV measures the average size of your red blood cells. It is one of the red cell indices on a complete blood count, alongside MCH and MCHC, and it is reported in femtolitres (fL). Testing.com describes it as a calculation from the cells in the sample rather than a direct measurement of one cell.
A small MCV means the red cells are smaller than usual (microcytic); a large MCV means they are bigger (macrocytic); a normal MCV with anaemia is called normocytic. The size helps show what kind of change in red cells is present.
Sources:MedlinePlus, Testing.com
Why do doctors order the MCV test?
Doctors use MCV, with the other indices, to help diagnose anaemia and find its type. MedlinePlus lists shortness of breath, tiredness, headache, dizziness and an irregular heartbeat among the symptoms that prompt the test, and long-term conditions that can lead to anaemia as another reason.
MCV is also part of routine check-ups, because it comes with every CBC. NHLBI lists it among the CBC values that may point to anaemia when higher or lower than normal.
Sources:MedlinePlus, NHLBI
What can change your MCV result?
MCV reflects what is happening to red cells over months, so it responds slowly and to several things at once.
- Low iron and thalassaemia make red cells smaller, lowering MCV.
- Low vitamin B12 or folate, liver disease and chemotherapy make red cells larger, raising MCV.
- Age, diet, activity level, medicines and a menstrual period can affect the result.
- Lead poisoning is a listed cause of a low MCV.
- Sudden blood loss, kidney failure or aplastic anaemia can lower haemoglobin while MCV stays normal.
Sources:MedlinePlus, Testing.com
How do you read MCV on your lab report?
On a CBC, MCV sits with the red cell indices under haemoglobin and the RBC count, printed as MCV or Mean Corpuscular Volume with a range in fL. Testing.com says the reference range depends on the equipment and procedures of the laboratory, so read your value against the range on your own report.
MCV is not read alone. MedlinePlus says it cannot diagnose disease by itself, and Testing.com says it is compared with the other indices, haemoglobin, haematocrit and your symptoms; a value outside the range does not always mean a problem needing treatment.
Amara reads MCV with the range printed beside it on each report, flags a value outside that range, and shows what changed since your last report. Try it with two sample reports
A sample Amara row for MCV: 78 fL on 15 Dec 2025 at Lab A (sample), then 84 fL on 30 Jun 2026 at Lab B (sample), each with its lab's printed range.
Sources:Testing.com, MedlinePlus
Questions people ask about MCV
What does MCV stand for?
MCV stands for mean corpuscular volume, the average volume, or size, of a red blood cell. MedlinePlus lists mean cell volume as another name. The value is printed in femtolitres (fL), one quadrillionth of a litre, and it is one of the red cell indices on a complete blood count.
What is the difference between MCV and MCH?
MCV is the average size of a red blood cell, while MCH is the average amount of haemoglobin inside each cell, in picograms. MedlinePlus lists low iron as a cause of a low value of either, low B12 or folate as a cause of a high value of either, and groups them with MCHC as the red cell indices.
Do I need to fast for an MCV test?
Fasting is not needed for MCV on its own. MedlinePlus says no special preparation is required, and fasting for several hours applies only when other tests on the same sample call for it. Testing.com says the same, so follow whatever instructions your lab gives for the full set of tests.
What does a high MCV on my report mean?
High MCV means the red cells are larger than the range your lab printed. MedlinePlus lists too little vitamin B12 or folate, liver disease and chemotherapy among the reasons, and conditions that affect B12 absorption such as coeliac or Crohn's disease. Your doctor reads it with haemoglobin, B12 and folate levels and your history.
Sources:MedlinePlus, Testing.com
Sources
- MCV (Mean Corpuscular Volume)MedlinePlus · medlineplus.gov · Opened
- RBC indicesMedlinePlus · medlineplus.gov · Opened
- MCV Blood Test: What Mean Corpuscular Volume MeansTesting.com · testing.com · Opened
- Anemia - DiagnosisNHLBI · nhlbi.nih.gov · Opened
About this page
Every statement on this page comes from the sources listed above. Ranges are those commonly printed on Indian lab reports; the range printed on your own report is the one that applies.
Published by Amara Health, a product of MetaNova AI Private Limited, Hyderabad.
Amara Health does not provide medical advice, diagnosis or treatment. Information shown by Amara is based on available health records and may contain errors. Review important information against the original report and consult a qualified healthcare professional for medical decisions. Do not use Amara for medical emergencies.
Amara does not diagnose. You do.
Your health history should be easier to use.
Start with two reports. Free, no card, about a minute.