Hunt and Hess Score Calculator
Select clinical findings to calculate the Hunt and Hess grade for subarachnoid hemorrhage and estimate surgical mortality risk.
Select Clinical Presentation
Choose the single grade that best describes the patient's condition.
Select a grade on the left
and click Calculate Grade.
Hunt & Hess
Clinical Criteria
Estimated Surgical Mortality
Prognosis & Management Notes
For educational and clinical reference only. Always apply direct patient assessment and specialist judgment. Mortality figures are approximate historical estimates.
Quick Reference Table
| Grade | Description | Mortality |
|---|---|---|
| I | Asymptomatic / mild headache | 0–5% |
| II | Moderate headache, no deficit | 2–10% |
| III | Drowsy, mild focal deficit | 10–15% |
| IV | Stupor, hemiparesis | 60–70% |
| V | Deep coma, decerebrate | 70–100% |
Summary
Select clinical findings to calculate the Hunt and Hess grade for subarachnoid hemorrhage and estimate surgical mortality risk.
How it works
- Review the patient's presenting neurological status immediately after SAH.
- Select the single grade description that best matches the clinical picture.
- If the patient has a serious systemic illness or severe vasospasm, add one grade.
- Read the calculated grade, typical prognosis, and estimated surgical mortality.
- Use the result alongside imaging (CT, angiography) to guide management decisions.
Use cases
- Grading subarachnoid hemorrhage severity at initial clinical assessment.
- Estimating surgical risk and timing of aneurysm repair.
- Communicating prognosis clearly between neurosurgery team members.
- Stratifying patients for clinical research and outcome studies.
- Tracking neurological deterioration with serial assessments.
- Teaching medical students and residents about SAH management principles.
Frequently Asked Questions
Last updated: 2026-06-09 ·
Reviewed by Nham Vu