ASA Physical Status Classification calculator
Result
ASA 1
30-day peri-op mortality ~<0.1%
E-suffix doubles approximate mortality risk. Used for pre-operative documentation and anaesthetic planning.
How to use it
- 1
Assign based on systemic disease burden. Focus on chronic conditions, not surgical diagnosis. Age alone is not a criterion.
- 2
Emergency surgery adds 'E'. ASA IIIE vs. ASA III: emergency surgery almost doubles peri-operative risk.
- 3
Widely required for consent and audit. Anaesthetist assigns ASA at pre-operative assessment.
When to use it
- Pre-operative consent
- ASA is part of surgical consent documentation in most jurisdictions.
- Triage for surgical urgency
- ASA IV–V: benefits and risks must be carefully weighed; senior involvement.
- Audit and benchmarking
- NCEPOD classification combined with ASA for mortality audits.
A reference for clinicians and students, not medical advice. A score supports a decision; it does not make one. Check every result against the patient in front of you and your local protocol.
At a glance
- Specialty
- Surgery and anaesthesia
- Inputs
- 2
- Type
- Points score
