🦠 Neutrophil-to-Lymphocyte Ratio (NLR)
Calculate the neutrophil-to-lymphocyte ratio (NLR), a simple inflammatory marker.
Neutrophil-to-Lymphocyte Ratio (NLR)
Absolute neutrophils (×10⁹/L)
Absolute lymphocytes (×10⁹/L)
When to use
Gauge physiological stress/inflammation and prognosis.
How it works
NLR = absolute neutrophils ÷ absolute lymphocytes. Normal ~1–3.
Key points
- Non-specific — rises with infection, stress and malignancy.
- Has prognostic value across many conditions.
- Interpret in clinical context.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.