Use this calculation to reproduce a derived blood-cell count, ratio, or coagulation screening value from results reported in the required units and collected at the same time.

Reticulocytes

A finite measured or assumed value from 0 through 100, expressed in %.

RBC count

A finite measured or assumed value greater than or equal to 0, expressed in million/µL.

The implementation follows this calculation rule: Compute the absolute reticulocyte count in thousands per microlitre as the reticulocyte percent times the RBC count in millions per microlitre times ten.^[1]

Absolute reticulocytes

The calculated absolute reticulocytes in K/µL.

This calculator cannot diagnose disease or bleeding risk. Analyzer methods, laboratory reference ranges, anticoagulants, sample quality, age, pregnancy, medication, and clinical context can materially affect interpretation. Preserve the input values and units so the result can be audited and recalculated.

Use the complete laboratory report and local reference intervals, and inspect trends rather than one isolated value. A clinician may require a blood film, differential count, mixing study, or another confirmatory test.

• Absolute Reticulocytes

  Compute absolute reticulocyte count from reticulocyte percentage and RBC count.

• Corrected Retic Percent

  Correct the reticulocyte percent for anemia by multiplying by the patient to normal hematocrit ratio with a reference normal hematocrit of 45 percent.

• ANC Calculator

  Compute absolute neutrophil count from white blood cell count and neutrophil percentage.