NIH Stroke Scale (NIHSS)
Standardized 15-item exam quantifying stroke severity.
RESULT
NIH Stroke Scale (NIHSS)
What is NIH Stroke Scale (NIHSS)?
Standardized 15-item exam quantifying stroke severity. NIH Stroke Scale is intended for use in: Adults.
How to Use the NIH Stroke Scale Calculator
- Enter 1a. Level of consciousness.
- Enter 1b. LOC questions.
- Enter 1c. LOC commands.
- Enter 2. Best gaze.
- Enter 3. Visual fields.
- Enter 4. Facial palsy.
- Enter 5a. Motor arm - left.
- Enter 5b. Motor arm - right.
- Enter 6a. Motor leg - left.
- Enter 6b. Motor leg - right.
- Enter 7. Limb ataxia.
- Enter 8. Sensory.
- Enter 9. Best language.
- Enter 10. Dysarthria.
- Enter 11. Extinction/inattention.
- Click Calculate to see your result and interpretation.
Formula & Version
This calculator uses formula version 1.0, last reviewed September 2026.
Clinical Considerations & Limitations
- Each item requires standardized bedside testing by a trained examiner — this calculator only sums pre-scored item values, it does not perform the exam.
References
- Brott T et al., Stroke 1989;20:864-870 (NINDS NIH Stroke Scale)
Frequently Asked Questions
What is NIH Stroke Scale (NIHSS)?
Standardized 15-item exam quantifying stroke severity.
Who is NIH Stroke Scale intended for?
Adults. Always confirm applicability to your specific patient before use.
What are the limitations of NIH Stroke Scale?
Each item requires standardized bedside testing by a trained examiner — this calculator only sums pre-scored item values, it does not perform the exam.
What formula or reference does NIH Stroke Scale use?
Brott T et al., Stroke 1989;20:864-870 (NINDS NIH Stroke Scale)
Is NIH Stroke Scale a diagnosis?
No. NIH Stroke Scale produces a score or estimate to support clinical decision-making — it is not a diagnosis and should be interpreted alongside full clinical judgement.
Medical Disclaimer: Medical calculators are provided for informational and educational purposes only. Results should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always verify results with a qualified healthcare professional.
