Injury Severity Score

Describes the severity of traumatic injury.

Injury Severity Score (ISS) Calculator

Injury Severity Score (ISS) Calculator

The Injury Severity Score is used to describe the severity of injury in a trauma patient. Major trauma is defined by a score > 15.

Injury severity of each of 6 body systems are scored according to the Abbreviated Injury Scale (AIS). The three body systems with the highest AIS scores are used to calculate the Injury Severity Score. Each of these three scores are squared, and the results summed to produce the Injury Severity Score (ISS). The score ranges from 3-75. If any body system has an ‘unsurvivable’ injury (AIS = 6), the total score automatically becomes 75.

Your Injury Severity Score (ISS) will appear here.

Note: Major trauma is defined by an ISS > 15.

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