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Glasgow Coma Scale

Total GCS from E + V + M. Free online Glasgow Coma Scale. Calculate glasgow coma scale online — fast, accurate, mobile-friendly, no signup needed.

GCS total
15

Derivation

  1. ├── 01GivenE = 4, V = 5, M = 6
  2. ├── 02Formulae.E+e.V+e.M
  3. ├── 03Substitutee.4+e.5+e.6
  4. └── 04Compute GCS total15
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§01What is

Understanding the Glasgow Coma Scale

The Glasgow Coma Scale computes GCS total from 3 inputs: eye (1-4), verbal (1-5), motor (1-6). Total GCS from E + V + M.

Health metrics give us objective checkpoints against a body that can feel unreliable. Used alongside professional guidance — not in place of it — these numbers help you track progress and spot trends that matter. The Glasgow Coma Scale sits in that toolkit — it total GCS from E + V + M. Enter your numbers above and the result updates instantly; every step of the math is shown in the Derivation panel so you can see exactly how the answer was reached.

§02The Formula

How it’s calculated

e.E+e.V+e.M

Where

E
Eye (1-4)
V
Verbal (1-5)
M
Motor (1-6)
§03Practical Example

Step-by-step walkthrough

Scenario

Apply the formula to a realistic set of inputs: Eye (1-4) = 4, Verbal (1-5) = 5, Motor (1-6) = 6.

  1. 01Start by noting the input — Eye (1-4): 4.
  2. 02Start by noting the input — Verbal (1-5): 5.
  3. 03Start by noting the input — Motor (1-6): 6.
  4. 04Substitute these values into the formula: e.E+e.V+e.M
  5. 05Compute GCS total: the calculator returns 15.
  6. 06Cross-check the answer by opening the Derivation panel above — every line of math is shown so you can follow the computation end-to-end.
§04Variants

Common Glasgow Coma Scale Problems

The formula gets rearranged depending on which variable you need. Here are the patterns you’ll run into in the real world — find the one that matches your problem and follow the worked steps.

01 · PATTERN

Eye (1-4) halved

E = 2 (from 4)

Keep every other input at its default and halve the eye (1-4). See how gcs total responds.

  1. 01New Eye (1-4): 2
  2. 02Baseline GCS total: 15
  3. 03New GCS total: 13
  4. 04GCS total decreases by 13.3% → use this sensitivity to plan for real-world variation.
02 · PATTERN

Eye (1-4) doubled

E = 8 (from 4)

Keep every other input at its default and double the eye (1-4). See how gcs total responds.

  1. 01New Eye (1-4): 8
  2. 02Baseline GCS total: 15
  3. 03New GCS total: 19
  4. 04GCS total increases by 26.7% → use this sensitivity to plan for real-world variation.
03 · PATTERN

Verbal (1-5) halved

V = 2.5 (from 5)

Keep every other input at its default and halve the verbal (1-5). See how gcs total responds.

  1. 01New Verbal (1-5): 2.5
  2. 02Baseline GCS total: 15
  3. 03New GCS total: 12.5
  4. 04GCS total decreases by 16.7% → use this sensitivity to plan for real-world variation.
04 · PATTERN

Verbal (1-5) doubled

V = 10 (from 5)

Keep every other input at its default and double the verbal (1-5). See how gcs total responds.

  1. 01New Verbal (1-5): 10
  2. 02Baseline GCS total: 15
  3. 03New GCS total: 20
  4. 04GCS total increases by 33.3% → use this sensitivity to plan for real-world variation.
§05FAQ

Frequently asked questions

Yes. The calculator implements the standard formula as documented and returns exact floating-point results. No approximations are used unless noted in the formula.
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