Clinical Scores

Glasgow Coma Scale (GCS) Calculator

Eye, verbal and motor responses scored 3 to 15; 8 or less usually means the airway needs protecting.

Reviewed by Alex G, BSN, RN, CEN, CCRN, CMC, NREMT-P · From the Reference tab of the app

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Formula

GCS = Eye Opening (1-4) + Verbal Response (1-5) + Motor Response (1-6)

How it is used

• GCS ≤ 8: "Less than eight, intubate." Indicates failure to protect the airway.
• Always record the breakdown (e.g., E3 V4 M5 = GCS 12) rather than just the total score.

Key points

• A drop in GCS of 2 or more points is considered a significant neurological decline requiring immediate evaluation.

Same formula as the app. Open it in the web app.

Related one-pagers

• Neuro: ICP and StrokeGCS 3–8 = severe; airway protection usually needed
• CEN Pediatric Emergencies: Ingestions, GI, Head Injury and FracturesGCS 14, altered mental status or basilar skull fracture signs: CT. Other risk factors: observation or CT by shared decision. Under 2 years: Pediatric Emergencies.
• Sepsis and Septic Shock BundleGCS · 13–14 · 10–12 · 6–9 · <6
• Forensics, Abuse and Sexual Assault in the EDImaging · CT angiography of the neck when symptomatic (GCS under 15, focal deficit, airway signs or dysphagia); arterial dissection and stroke are possible injuries

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• Richmond Agitation-Sedation Scale (RASS)

For education and exam preparation only. Follow your institution’s protocols. For education and exam preparation only. Verify results independently and follow your institution’s protocols. Not a substitute for clinical judgment.