RBC Indices Calculator | What is MCHC?

Red blood cell indices rely on fundamental hematological measurements from a routine blood test. The primary formulas used by the calculator are:
MCV = (Hematocrit / RBC) * 10, measured in femtoliters (fL), which describes the average size of your red blood cells.
MCH = (Hemoglobin / RBC) * 10, measured in picograms (pg), representing the average weight of hemoglobin inside a single red blood cell.
MCHC = (Hemoglobin / Hematocrit) * 100, measured in grams per deciliter (g/dL), indicating the concentration of hemoglobin relative to the volume of the cell.

Let us walk through a practical calculation using a realistic patient complete blood count profile. Suppose a patient has a hemoglobin (Hgb) level of 14 g/dL, a hematocrit (Hct) level of 42%, and a red blood cell count (Rbc) of 5.0 million cells per microliter.

1. Calculating MCV: Divide hematocrit by RBC, then multiply by 10. (42 / 5.0) * 10 = 8.4 * 10 = 84 fL. This indicates a normal average cell size.
2. Calculating MCH: Divide hemoglobin by RBC, then multiply by 10. (14 / 5.0) * 10 = 2.8 * 10 = 28 pg. This reflects normal hemoglobin mass per cell.
3. Calculating MCHC: Divide hemoglobin by hematocrit, then multiply by 100. (14 / 42) * 100 = 0.3333 * 100 = 33.3 g/dL. This shows normal hemoglobin concentration within the cells.

When reviewing your red blood cell indices, keep these professional recommendations in mind:
- Always cross-reference your calculated values with the specific reference range provided by the laboratory that processed your blood sample, as assay methods can vary slightly.
- RBC indices are rarely interpreted in complete isolation; they are most valuable when evaluated alongside a peripheral blood smear and clinical symptoms.
- Ensure input units are consistent (e.g., standard g/dL for hemoglobin and percentage for hematocrit) to prevent calculation errors.