COVID-19 Severity Classification Calculator

COVID-19 clinical severity classification (asymptomatic to critical).

For educational and clinical reference. Not a substitute for medical judgment. See the medical disclaimer.
Severity tier
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Interpretation
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References

  1. National Institutes of Health. COVID-19 Treatment Guidelines: Clinical Spectrum of SARS-CoV-2 Infection. NIH; 2023.

How to use

  1. Select the clinical presentation that best matches the patient.
  2. The severity tier and general management direction update instantly.
  3. Follow current treatment guidelines for tier-specific therapy.

Frequently asked questions

How is COVID-19 severity classified?

By clinical spectrum: asymptomatic, mild, moderate, severe, and critical illness, primarily driven by oxygenation and organ dysfunction.

What defines severe COVID-19?

SpO₂ < 94% on room air, respiratory rate > 30/min, PaO₂/FiO₂ < 300, or lung infiltrates > 50%.

What defines critical COVID-19?

Respiratory failure, septic shock, and/or multiple organ dysfunction requiring intensive support.

Does this tool recommend treatment?

It maps the severity tier to general management direction; specific therapy follows current guideline recommendations and individual factors.

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