Neutrophil to Lymphocyte Ratio (NLR) Calculator

How to calculate Neutrophil to Lymphocyte ratio calculator?

The NLR is calculated by dividing the absolute neutrophil count by the absolute lymphocyte count; it is a simple marker of systemic inflammation.

Use the formula: NLR = Neutrophil count ÷ Lymphocyte count

Using the Neutrophil to Lymphocyte ratio calculator calculator: an example

Example values: Neutrophil = 4.5 × 10^9/L and Lymphocyte = 2.0 × 10^9/L.

Step-by-step calculation:

1. Write down the counts: Neutrophil = 4.5 × 10⁹/L, Lymphocyte = 2.0 × 10⁹/L.
2. Apply the formula: NLR = 4.5 ÷ 2.0.
3. Compute the result: 4.5 ÷ 2.0 = 2.25.
4. Interpretation: an NLR of 2.25 is within a commonly reported reference range for many adults; interpret with clinical context.

Frequently Asked Questions

What is a normal NLR value?

Typical values in healthy adults are often around 1 to 3, but reference ranges vary by laboratory and patient population.

Can NLR change quickly?

Yes. Acute infection, inflammation, stress, or certain medications can alter neutrophil and lymphocyte counts and thus change NLR rapidly.

Should I act on an abnormal NLR by itself?

No. An abnormal NLR is not a diagnosis on its own; discuss abnormal results with a clinician who can interpret them alongside symptoms and other tests.