Glasgow Coma Scale (GCS) Calculator
Choose the best response in each category to get the GCS score.
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Glasgow Coma Scale (GCS) Calculator by TheCalcTools
How the Glasgow Coma Scale (GCS) Calculator works
The Glasgow Coma Scale adds the best eye (1-4), verbal (1-5) and motor (1-6) responses, giving 3 to 15. Recording the three parts separately (for example E3 V4 M5) is more informative than the total.
A score of 8 or less usually indicates a severe brain injury. This tool supports assessment by trained staff; it is not for self-diagnosis.
The formula
Worked example
Using the default values shown in the calculator:
| Eye opening | 4: Spontaneous |
|---|---|
| Verbal response | 5: Oriented |
| Motor response | 6: Obeys commands |
- E4 V5 M6 = 15: Mild (13 to 15).
Result:
| GCS score | 15 |
|---|---|
| Written as | E4 V5 M6 |
| Head injury severity | Mild (13 to 15) |
Frequently asked questions
What if the patient is intubated?
The verbal score cannot be tested; it is recorded as ‘T’ (for example E3 VT M5) and the total is not comparable.
Sources and further reading
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This calculator gives general estimates for information and education. It is not medical advice and does not diagnose anything. Talk to a qualified health professional about your own situation. See our disclaimer.