RBC Indices Calculator
Calculate RBC indices including MCV, MCH, and MCHC from hemoglobin, hematocrit, and RBC count. Free online health tool for anemia assessment and blood test interpretation.
About This Calculator
RBC indices are calculated parameters derived from your complete blood count (CBC) that help assess the size, hemoglobin content, and hemoglobin concentration of your red blood cells. The three main RBC indices are MCV (mean corpuscular volume), MCH (mean corpuscular hemoglobin), and MCHC (mean corpuscular hemoglobin concentration).
These indices are not directly measured in the laboratory but are calculated using standard formulas: MCV (fL) = (Hematocrit / RBC count) × 10, MCH (pg/cell) = (Hemoglobin / RBC count) × 10, and MCHC (g/dL) = (Hemoglobin / Hematocrit) × 100. They provide critical information for classifying types of anemia — whether red blood cells are too small (microcytic), too large (macrocytic), or normal-sized (normocytic), and whether they have adequate hemoglobin (normochromic) or are hemoglobin-deficient (hypochromic).
Low MCV with low MCH is characteristic of iron deficiency anemia and thalassemia. High MCV suggests macrocytic anemias from vitamin B12 or folate deficiency. Low MCHC indicates hypochromia, commonly seen in iron deficiency. Normal values typically fall within: MCV 80-100 fL, MCH 27-34 pg/cell, MCHC 32-36 g/dL, though ranges may vary slightly by laboratory and population.
This calculator serves educational and reference purposes. If your blood test results are abnormal, please consult a healthcare professional for proper diagnosis and treatment. Anemia can be caused by many conditions including nutritional deficiencies, chronic diseases, bone marrow disorders, and genetic conditions like sickle cell disease or thalassemia.
Frequently Asked Questions
What are RBC indices?
RBC indices are calculated blood test parameters derived from hemoglobin, hematocrit, and red blood cell count. They include MCV (mean corpuscular volume), MCH (mean corpuscular hemoglobin), and MCHC (mean corpuscular hemoglobin concentration), which help classify different types of anemia.
How is MCV calculated?
MCV (mean corpuscular volume) is calculated as: MCV (fL) = (Hematocrit % / RBC count in million/mcL) × 10. It measures the average size of your red blood cells. Normal range is typically 80-100 fL.
What does low MCH indicate?
Low MCH (mean corpuscular hemoglobin) indicates hypochromic anemia, where red blood cells contain less hemoglobin than normal. This is commonly seen in iron deficiency anemia, thalassemia, and anemia of chronic disease. Normal MCH range is 27-34 pg/cell.
What is the difference between MCH and MCHC?
MCH measures the average mass of hemoglobin per red blood cell (pg/cell), while MCHC measures the concentration of hemoglobin in a given volume of red blood cells (g/dL). MCHC is more sensitive to cell hydration status. Normal MCHC range is 32-36 g/dL.
Can RBC indices diagnose anemia?
RBC indices help classify anemia into microcytic (low MCV), normocytic (normal MCV), or macrocytic (high MCV) types. Low MCH and MCHC suggest hypochromic anemia. However, a complete diagnosis requires correlation with other lab values and clinical evaluation by a healthcare professional.
What are normal RBC indices values?
Normal adult reference ranges typically are: MCV 80-100 fL, MCH 27-34 pg/cell, MCHC 32-36 g/dL. These ranges may vary slightly between laboratories, by sex, and by age. Always consult your lab's reference range printed on your report.
How accurate is this RBC indices calculator?
This calculator uses the standard medical formulas for MCV, MCH, and MCHC. Results are for educational and reference purposes only. They should not replace professional medical advice, diagnosis, or treatment.