Glasgow Coma Scale (GCS) Calculator

Add the eye, verbal and motor responses to get the Glasgow Coma Scale from 3 to 15. Example: eyes open spontaneously (4), oriented speech (5) and obeys commands (6) give a GCS of 15.

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Eye opening

Verbal response

Motor response

How to use the Glasgow Coma Scale (GCS) Calculator

Enter the values in the fields.
Press Calculate to see the result with the steps shown.

Formula and method

GCS = eye response (1 to 4) + verbal response (1 to 5) + motor response (1 to 6). Range 3 to 15.

Glasgow Coma Scale components

Domain	Scores
Eye	4 spontaneous, 3 to sound, 2 to pressure, 1 none
Verbal	5 oriented, 4 confused, 3 words, 2 sounds, 1 none
Motor	6 obeys, 5 localizes, 4 withdraws, 3 flexion, 2 extension, 1 none

Severity

GCS	Severity
13 to 15	Mild
9 to 12	Moderate
3 to 8	Severe

Report the components

GCS 9 as E4 V3 M2 tells a different story from E2 V3 M4. Always record the breakdown and the best response observed.

Cautions

This calculator is for education and is not medical advice. Decisions about diagnosis and treatment belong with a qualified clinician.

Frequently asked questions

What is a normal GCS?

15.

What is the lowest GCS?

What GCS means coma?

8 or below is generally regarded as severe.

Is GCS used in children?

A pediatric version is used for young children.

Why is eye score minimum 1?

Because “none” still scores 1.

How often is it checked?

Serially, based on the clinical setting.

Sources

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