Glasgow Coma Scale (GCS) Calculator — free guideline decision tool

Score level of consciousness with the Glasgow Coma Scale (GCS) from eye, verbal and motor responses (3–15).

GCS = Eye(1–4) + Verbal(1–5) + Motor(1–6). Severity: ≤ 8 severe, 9–12 moderate, 13–15 mild. Score best Eye (1–4), Verbal (1–5) and Motor (1–6) responses; always document the EVM breakdown.

Assess and trend consciousness in trauma, stroke and the critically ill. Record the EVM components.

13–15 mild, 9–12 moderate, ≤ 8 severe/coma (often needs airway protection).

Always report components (e.g. E3V4M5), not just the total. Score the best response; if intubated, verbal = 1T. GCS ≤ 8 — consider a definitive airway.

If intubated, score verbal as 1T and note it explicitly. Interpret with pupils and focal neurology — GCS alone is incomplete. Score the best response; sedatives and language barriers confound verbal. For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.

Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.

Inputs: Eye opening 3 To speech, Verbal response 3 Inappropriate words, Motor response 4 Withdraws → Result: GCS 10 /15（Breakdown: E3 V3 M4, Severity: Moderate brain injury, Airway: Monitor; reassess for change.） Inputs: Eye opening 4 Spontaneous, Verbal response 5 Oriented, Motor response 6 Obeys commands → Result: GCS 15 /15（Breakdown: E4 V5 M6, Severity: Mild brain injury, Airway: Monitor; reassess for change.）