Corrected WBC Count Calculator

Correct the white blood cell count when nucleated red blood cells are present.

Aug 31, 2026 Hematology #corrected-wbc #nrbc

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Reported WBC count (10^9/L)

NRBC per 100 WBC (count)

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Enter your values and press Calculate to see the result.

Reference Ranges Used

WBC (White Blood Cells) - Adult 4.5–11 ×10³/µL

Formula & Clinical Notes

Formula

Corrected WBC = Reported WBC × 100 / (100 + NRBC per 100 WBC)

Clinical Notes

The corrected WBC adjusts the automated count for nucleated red blood cells (NRBCs), which automated analyzers count as white blood cells. A significant NRBC count may overestimate the true leukocyte count.

Sources

Merck Manual Professional — Evaluation of Anemia