Neutrophil-to-Lymphocyte Ratio Calculator

Calculate the neutrophil-to-lymphocyte ratio as an inflammation marker.

Aug 31, 2026 Hematology #ratio #inflammation #nlr

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Absolute neutrophil count (10^9/L)

Absolute lymphocyte count (10^9/L)

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Formula & Clinical Notes

Formula

NLR = Absolute Neutrophil Count / Absolute Lymphocyte Count

Clinical Notes

The neutrophil-to-lymphocyte ratio is a widely studied systemic inflammation marker. Values above approximately 3-4 are often considered elevated and have been associated with worse outcomes in various conditions, though cutoffs vary by population.

Sources

Neutrophil-to-lymphocyte ratio as an inflammatory marker