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Use our NIH Stroke Scale calculator to add all 15 NIHSS scores and quickly find the total score from 0 to 42.
| Score | Severity |
|---|---|
| 0 | No stroke symptoms |
| 1–4 | Minor stroke |
| 5–15 | Moderate stroke |
| 16–20 | Moderate to severe stroke |
| 21–42 | Severe stroke |
The NIH Stroke Scale calculator makes NIHSS scoring much easier. It adds the scores from 15 stroke checks. The NIH Stroke Scale helps health care staff rate stroke signs in a clear way. NINDS lists it as a 15-item neurologic exam.
Your score can range from 0 to 42. A higher score means a greater measured stroke deficit.
NIHSS Total = 1a + 1b + 1c + 2 + 3 + 4 + 5a + 5b + 6a + 6b + 7 + 8 + 9 + 10 + 11
Each part has a set score range. The calculator adds all 15 scores. The maximum total is 42.
The 15 parts check alertness, questions, commands, gaze, vision, facial movement, arm strength, leg strength, ataxia, sensation, language, speech, and attention.
The official NIHSS exam has set rules for each item. Proper training helps ensure that each item gets the right score.
Say the 15 scores are 1, 1, 0, 1, 1, 1, 2, 0, 1, 2, 1, 0, 1, 1, and 0.
Add them together:
NIHSS = 1 + 1 + 0 + 1 + 1 + 1 + 2 + 0 + 1 + 2 + 1 + 0 + 1 + 1 + 0
NIHSS = 13
In this calculator, a score of 13 gives the result “Moderate Stroke.”
The code uses these result bands. A score of 0 means “No Stroke Symptoms.” Scores 1–4 mean “Minor Stroke.” Scores 5–15 mean “Moderate Stroke.” Scores 16–20 mean “Moderate to Severe Stroke.” Scores 21–42 mean “Severe Stroke.” These bands also match the AHA score table.
The calculator also checks each entry. A score must be a whole number within that item's allowed range. All 15 parts must have a score. If one is missing, the tool asks you to score every part.
This free NIH Stroke Scale tool gives a fast way to total an NIHSS exam. It can help check the math after each item is scored. It does not replace a trained clinical exam.
NINDS says health care providers use the NIH Stroke Scale to assess stroke severity. A trained provider should perform the exam and follow the proper scoring rules.
It is a tool that adds the 15 NIHSS item scores and gives a total from 0 to 42.
Score all 15 items, then add the scores. That sum is the NIHSS total.
The highest NIHSS score is 42.
Yes. An online NIH Stroke Scale tool can add the scores for you. The exam itself needs proper clinical training.
In this calculator, 13 falls in the programmed “Moderate Stroke” band. This score label does not replace a clinical diagnosis or treatment plan.
Use our NIH Stroke Scale calculator to add all 15 NIHSS scores and quickly find the total score from 0 to 42.