Glasgow Coma Scale (GCS) Calculator
Score a patient's level of consciousness. Select the best eye, verbal and motor responses to get the total Glasgow Coma Scale (3–15), a severity band, and the E/V/M breakdown to document.
Eye opening
Verbal response
Motor response
Mild 13–15 · Moderate 9–12 · Severe ≤ 8. A GCS ≤ 8 usually indicates a need to protect the airway.
For reference/education only — not a substitute for clinical assessment. Report as the sum plus components (e.g. GCS 14, E4 V4 M6).
The three components
The GCS assesses eye opening (E, 1–4), verbal response (V, 1–5) and motor response (M, 1–6). Always record the components, not just the total — “GCS 14 (E4 V4 M6)” — as the motor score carries the most prognostic weight and the same total can mean different things.
Frequently asked questions
How is the GCS calculated?+
GCS is the sum of three components: best eye opening (1–4), best verbal response (1–5), and best motor response (1–6). The total ranges from 3 (deep coma) to 15 (fully alert).
What GCS is considered severe?+
A total of 13–15 is mild, 9–12 is moderate, and 8 or below is severe. A GCS ≤ 8 is a common threshold for considering airway protection (intubation).
How should GCS be documented?+
Always report the components alongside the total — e.g. "GCS 14 (E4 V4 M6)" — because the same total can reflect different clinical pictures, and the motor score is the most prognostic.
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