Injury Severity Score (ISS)
Enter AIS severity (0–6) for six body regions; ISS = sum of squares of the three highest AIS values (standard method).
Calculator
How it works
The ISS aggregates the three most severe regional AIS injuries by squaring and summing them; maximum ISS is 75.
Limits
Requires accurate AIS coding from injury data; does not replace trauma team activation criteria at your center.
Educational tool only—not for diagnosis or treatment decisions.