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About this tool
Score eye, verbal and motor responses to get a total GCS (3-15), severity band and GCS-Pupils score, for training and revision.
The Glasgow Coma Scale Calculator adds the three Glasgow Coma Scale components — eye opening (1-4), verbal response (1-5) and best motor response (1-6) — into a total between 3 and 15, and reports it in the standard E/V/M notation. It also applies the conventional severity bands (3-8 severe, 9-12 moderate, 13-15 mild) and the GCS-Pupils score, which subtracts the number of unreactive pupils from the total. Wording follows the Glasgow Structured Approach to Assessment, with a separate option set for pre-verbal children.
Open Glasgow Coma Scale Calculator on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Component descriptors follow the 2014 Glasgow Structured Approach, including 'to sound' and 'to pressure'.
Marking the verbal response not testable reports the sum with a T suffix instead of inventing a score.
Subtracts the pupil reactivity score from the total, giving the 1-15 GCS-P used in head-injury prognosis.
A fully alert person scores 15 — the maximum, made up of E4 (eyes open spontaneously), V5 (orientated) and M6 (obeys commands). The lowest possible score is 3, since each of the three components has a minimum of 1; there is no score of 0.
A total of 8 or below is conventionally classed as severe and is the usual threshold at which airway protection becomes the priority, because patients at or below 8 often cannot maintain their own airway. Scores of 9-12 are moderate and 13-15 mild.
The verbal component cannot be tested, so it is recorded as VNT or VT rather than scored. The eye and motor components are summed and reported with a T suffix — for example E4 VNT M6 is written as 10T. Severity bands are not applied to an incomplete scale.
GCS-Pupils (GCS-P) subtracts a pupil reactivity score from the GCS total: 0 if both pupils react to light, 1 if one is unreactive and 2 if neither reacts. It extends the bottom of the scale from 3 down to 1, separating patients who all score 3 on the standard scale. This page is informational only — interpretation of any score belongs with the treating clinician.
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