RBC Indices
Enter hemoglobin (g/dL), hematocrit (%), and RBC count (×10⁶/µL) to derive MCV, MCH, and MCHC for anemia classification.
MCV
83.3 fL
MCH
28.1 pg
MCHC
33.8 g/dL
How to Use This Calculator
Gather CBC results
Use values from the same sample to avoid inconsistencies due to hemodynamic changes.
Enter values with correct units
Hemoglobin in g/dL, hematocrit in percentage, RBC count in millions per microliter (×10⁶/µL).
Interpret indices with clinical context
Combine MCV, MCH, MCHC with RDW, iron studies, and patient history to classify anemia and guide further testing.
Formula
MCV (fL) = Hematocrit (%) × 10 ÷ RBC (×10⁶/µL)
MCH (pg) = Hemoglobin (g/dL) × 10 ÷ RBC (×10⁶/µL)
MCHC (g/dL) = Hemoglobin (g/dL) × 100 ÷ Hematocrit (%)
Reference ranges: MCV 80–100 fL, MCH 27–33 pg, MCHC 32–36 g/dL.
Full Description
RBC indices are integral to anemia evaluation. MCV categorizes anemia into microcytic, normocytic, or macrocytic types. MCH and MCHC gauge hemoglobin content per cell, identifying hypochromia or hyperchromia. Changes in indices guide targeted investigations such as iron studies, vitamin B12 levels, electrophoresis, or bone marrow exams.
Frequently Asked Questions
Why is MCHC rarely elevated?
Because hemoglobin saturation in RBCs has an upper limit. Elevated MCHC often indicates spherocytosis or lab artifact (e.g., hemolysis).
Does dehydration affect indices?
Hemoconcentration may raise hematocrit, altering MCV and MCHC. Rehydrate and repeat testing if results are unexpected.
Should I rely solely on indices?
No. Indices provide guidance but must be interpreted alongside clinical findings and additional labs.
What about RDW?
RDW measures size variability and complements indices in differentiating anemia types, especially when mixed populations of RBCs are present.