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Centor Score for Strep Throat Calculator

Likelihood of Group A Strep pharyngitis.

Calculates the Centor score (modified McIsaac) for strep throat: tonsillar exudates (+1), tender anterior lymph nodes (+1), temperature >38°C (+1), no cough (+1), age 3–14 (+1), age ≥45 (−1). Score guides testing vs empirical antibiotics.

Priya Venkatesan By Priya Venkatesan
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Score 0–1: No test/antibiotics; 2–3: Rapid test; ≥4: Consider empirical Abx.

In depth

Calculates the Centor score (modified McIsaac) for strep throat: tonsillar exudates (+1), tender anterior lymph nodes (+1), temperature >38°C (+1), no cough (+1), age 3–14 (+1), age ≥45 (−1). Score guides testing vs empirical antibiotics.