Glasgow Coma Scale (GCS) Calculator
The Glasgow Coma Scale (GCS) scores level of consciousness from eye, verbal and motor responses, giving a total from 3 to 15. It is the standard tool for assessing impaired consciousness.
Quick answer
The Glasgow Coma Scale (GCS) scores consciousness from three responses β eye opening (1β4), verbal (1β5) and motor (1β6) β for a total of 3 to 15. It is reported as the total plus the three components (for example E4 V5 M6 = 15). A total of 8 or less usually signals a need to protect the airway.
Best response in each domain
Mild (13β15) Β· E4 V5 M6
The Glasgow Coma Scale total is 15/15 (Mild (13β15)), recorded as E4 V5 M6. GCS is best reported as the three components, not just the sum, because the components carry more clinical information. A GCS of 8 or less generally signals a need to protect the airway.
The score is for assessing and tracking consciousness; it does not by itself diagnose a cause. If someone has a reduced GCS, seek urgent medical care.
How to use the Glasgow Coma Scale calculator
- 1Pick the best eye-opening response. Select the best eye-opening response (spontaneous 4, to sound 3, to pressure 2, none 1).
- 2Pick the best verbal and motor responses. Select the best verbal response (oriented 5 to none 1) and the best motor response (obeys commands 6 to none 1).
- 3Read the total and components. The tool shows the total (3β15) and the E/V/M breakdown, plus the broad severity band.
Medical disclaimer: This is general health information, not medical advice. It does not diagnose or treat any condition, and the results are estimates based on public reference formulas. Always consult a qualified doctor about your individual health. If you think you may have a medical emergency, contact your local emergency services immediately.
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Book a consultationFrequently asked questions
What is a normal Glasgow Coma Scale score?β
A fully alert person scores 15 (E4 V5 M6). The lowest possible score is 3. A total of 8 or less is generally regarded as a coma and a trigger to consider airway protection.
Why report the components, not just the total?β
The same total can reflect very different patients, and the motor component in particular carries strong prognostic information, so GCS is best recorded as E, V and M separately.
Does GCS tell me the cause of reduced consciousness?β
No. It measures and tracks the level of consciousness; it does not identify the cause. A reduced GCS needs urgent medical assessment.
Sources & validation
This calculator reproduces the published Glasgow Coma Scale score, validated for assessment and tracking of level of consciousness (head injury, neuro).
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