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8 calculators
Neurological scoring systems for stroke severity, subarachnoid haemorrhage grading, functional outcome prediction, and head injury assessment across adult and paediatric populations. The NIH Stroke Scale and modified Rankin Scale are standard in acute stroke care and clinical trials. The ABCD2 score stratifies transient ischaemic attack recurrence risk. The Essen Stroke Risk Score predicts long-term cerebrovascular events. For subarachnoid haemorrhage, the Hunt and Hess scale grades clinical severity, while the Ottawa SAH Rule guides CT/lumbar puncture decisions. The FOUR score provides neurological assessment for intubated patients where GCS cannot be reliably scored. The RACE scale supports prehospital stroke severity assessment. Most neurological scales have greatest inter-rater reliability when scoring is performed by trained clinicians.
Every tool in this domain is linked below, each with its own formula, inputs, and interpretation notes. Starting from the clinical area instead of the subject? The same calculators are grouped on the specialties pages, the full alphabetical list collects everything in one place, and the comparison tool lines up three tools side by side.
The National Institutes of Health Stroke Scale quantifies neurologic impairment after acute stroke by scoring 15 examination items (level of consciousness, orientation, commands, gaze, visual fields, facial palsy, motor arm and leg, ataxia, sensory, language, dysarthria, and extinction). The total ranges 0–42; higher scores indicate more severe deficit.
NeurologyThe ABCD2 score stratifies the short-term risk of stroke after a transient ischemic attack (TIA) using Age, Blood pressure, Clinical features, Duration of symptoms, and Diabetes. The total ranges 0–7 and estimates the 2-day risk of subsequent stroke.
NeurologyThe Hunt and Hess scale classifies the clinical severity of aneurysmal subarachnoid hemorrhage into five grades based on headache, nuchal rigidity, level of consciousness, and focal deficits. Higher grades predict higher mortality.
NeurologyThe modified Rankin Scale (mRS) measures the degree of functional disability after a stroke or other neurologic event using six levels from 0 (no symptoms) to 5 (severe disability), plus 6 for death. It is the standard outcome measure in stroke trials.
NeurologyThe Ottawa Subarachnoid Hemorrhage Rule identifies patients with acute nontraumatic headache who require CT to rule out SAH. If any of six high-risk findings is present, CT is indicated; if none are present, CT is not required (100% sensitivity).
NeurologyThe FOUR (Full Outline of Unresponsiveness) score assesses coma depth using four components — Eye response, Motor response, Brainstem reflexes, and Respiration — each scored 0–4 for a total of 0–16. Lower scores indicate deeper coma and higher in-hospital mortality.
NeurologyThe RACE (Rapid Arterial oCclusion Evaluation) scale is a prehospital tool that scores 5 items — facial palsy, arm motor, leg motor, gaze deviation, and aphasia/agnosia — on a 0–9 scale. A score of 5 or more suggests a large vessel occlusion stroke.
NeurologyThe Essen Stroke Risk Score (ESRS) estimates the long-term risk of recurrent stroke in patients with a history of ischemic stroke or TIA. Points are awarded for age, hypertension, diabetes, prior myocardial infarction, other cardiovascular disease, peripheral arterial disease, smoking, and prior ischemic events; the total ranges 0–9.
Neurology