Neurology

NIH Stroke Scale Calculator

Stroke severity assessment

Calculate NIHSS

Level of Consciousness

LOC Questions (Month/Age)

LOC Commands

Best Gaze

Visual Fields

Facial Palsy

Motor Arm – Left

Motor Arm – Right

Motor Leg – Left

Motor Leg – Right

Limb Ataxia

Sensory

Best Language

Dysarthria

Extinction/Inattention

Clinical use

Use this calculator for stroke severity assessment in theneurology workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.

Interpretation

Score 0-4: minor. 5-15: moderate. 16-20: moderate-severe. 21-42: severe. Used for thrombolysis eligibility and prognostication. Assess serially.

Required inputs

Level Of Consciousness
Loc Questions
Loc Commands
Best Gaze
Visual
Facial Palsy
Motor Arm Left
Motor Arm Right
Motor Leg Left
Motor Leg Right
Limb Ataxia
Sensory
Best Language
Dysarthria
Extinction Inattention

Evidence and limitations

This page cites 1 published reference. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.

References

Brott T et al. Stroke 1989;20:864-870

Frequently asked questions

What is the NIH Stroke Scale?

NIH Stroke Scale is a clinical calculator used for Stroke severity assessment.

How do I interpret the NIH Stroke Scale?

Score 0-4: minor. 5-15: moderate. 16-20: moderate-severe. 21-42: severe. Used for thrombolysis eligibility and prognostication. Assess serially.

What inputs are required for the NIH Stroke Scale?

Required inputs include Level Of Consciousness, Loc Questions, Loc Commands, Best Gaze, Visual, Facial Palsy, Motor Arm Left, Motor Arm Right, Motor Leg Left, Motor Leg Right, Limb Ataxia, Sensory, Best Language, Dysarthria, Extinction Inattention.