Neutrophil-to-Lymphocyte Ratio (NLR)
Neutrophil-to-lymphocyte ratio: absolute neutrophil count / absolute lymphocyte count; a typical reference is roughly 1–3 and > 3 is often considered elevated.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Absolute neutrophil count
- 6 ×10⁹/L
- Absolute lymphocyte count
- 1.5 ×10⁹/L
Result: Neutrophil-to-lymphocyte ratio 4 — elevated (> 3; typical reference roughly 1-3).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- roughly 1-3
- Typical healthy reference range.
- > 3
- Commonly regarded as elevated. NLR = ANC / ALC. A nonspecific inflammation/stress marker; context-dependent.
What you enter
- Absolute neutrophil count
- Absolute lymphocyte count
How this is calculated
Zahorec R. Ratio of neutrophil to lymphocyte counts - rapid and simple parameter of systemic inflammation and stress in critically ill. Bratisl Lek Listy. 2001;102(1):5-14. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.