The Vascular Brain
Interactive tools

Stroke calculators.

Bedside-ready scores for TIA risk, stroke severity, AFib stroke and bleeding risk, and post-thrombolysis hemorrhage risk — free educational calculators from a vascular neurologist.

Educational use only. These calculators support learning and bedside discussion. They do not replace clinical judgment, imaging, or emergency care. Stroke symptoms? Call 911.

TIA risk

After a transient ischemic attack

Calculator

ABCD2 Score

Short-term stroke risk after TIA (0–7). Instant risk band plus dual-antiplatelet context.

Open calculator → Calculator

Canadian TIA Score

13-variable 7-day stroke risk after TIA — often more accurate than ABCD2 for triage tempo.

Open calculator →

Acute stroke severity

Severity at the bedside

Calculator

NIHSS Calculator

Full 15-item NIH Stroke Scale (0–42) with live total and severity band.

Open calculator → Calculator

SEDAN Score

Symptomatic ICH risk after IV thrombolysis from five quick variables (0–6).

Open calculator →

Atrial fibrillation

Stroke risk and bleeding risk

Calculator

CHA2DS2-VASc

Annual stroke risk in nonvalvular AFib (0–9) to frame anticoagulation decisions.

Open calculator → Calculator

HAS-BLED

Major bleeding risk on oral anticoagulation (0–9). Pair with CHA2DS2-VASc — do not use alone to withhold treatment.

Open calculator →

More clinical tools

Guides, checklists, and scales

Hub

All clinical tools

mRS, ASPECTS, thrombolysis and thrombectomy eligibility, workup and discharge checklists.

Browse tools → Articles

Long-form reviews

Guideline reads, TIA and stroke education, and the evidence behind the scores.

Browse articles →

Written by Zaka Ahmed, MD · Subscribe to The Vascular Brief