Health
NIH Stroke Scale Calculator
Quantify stroke severity across 11 examination items.
1a. Level of Consciousness Alert (0) Not alert, arousable (1) Not alert, obtunded (2) Unresponsive (3)
1b. LOC Questions (month, age) Both correct (0) One correct (1) Neither correct (2)
1c. LOC Commands (open/close, grip) Both correct (0) One correct (1) Neither correct (2)
2. Best Gaze Normal (0) Partial gaze palsy (1) Forced deviation (2)
3. Visual Fields No visual loss (0) Partial hemianopia (1) Complete hemianopia (2) Bilateral hemianopia/blind (3)
4. Facial Palsy Normal (0) Minor paralysis (1) Partial paralysis (2) Complete paralysis (3)
5. Motor Arm (worst side) No drift (0) Drift (1) Some effort against gravity (2) No effort against gravity (3) No movement (4)
6. Motor Leg (worst side) No drift (0) Drift (1) Some effort (2) No effort against gravity (3) No movement (4)
7. Limb Ataxia Absent (0) Present in one limb (1) Present in two limbs (2)
8. Sensory Normal (0) Mild-moderate loss (1) Severe/total loss (2)
9. Best Language No aphasia (0) Mild-moderate aphasia (1) Severe aphasia (2) Mute/global aphasia (3)
10. Dysarthria Normal (0) Mild-moderate (1) Severe/mute (2)
11. Extinction/Inattention No abnormality (0) One modality (1) Two modalities (2)
Calculate NIHSS
About NIHSS The NIH Stroke Scale quantifies stroke severity from 0 (no symptoms) to 42 (maximum). Scores > 25 indicate very severe stroke. NIHSS guides treatment decisions: tPA is generally considered for scores 4–25 within the time window. Serial NIHSS measurements track improvement or deterioration.