Everyday injury severity score (iss) problems come down to one relationship between abdomen, chest, extremity, external, face and head and neck. This calculator turns those numbers into injury severity score, with the working shown so you can check the result rather than simply trust it.
What Is the Injury Severity Score (ISS) Calculator?
The injury severity score (iss) calculator gives you an estimate of injury severity score based on abdomen, chest, extremity, external, face and head and neck.
It is a quick reference figure rather than a diagnosis, and it is most useful for tracking how a number moves over time rather than for interpreting a single reading.
How the Injury Severity Score (ISS) Estimate Is Worked Out
The calculation follows published reference relationships, so it is a reasonable approximation when the inputs are accurate. It assumes an average adult and does not account for individual variation.
If you are comparing two people, or the same person over a period of weeks, keep the method and the inputs identical. A change in the method can easily look like a change in the person.
What This Calculator Does Not Do
It does not diagnose anything, and it does not replace advice from a clinician. If a figure comes out at an extreme, or if it differs sharply from what you expect, that is a reason to speak to a professional rather than to adjust the inputs.
Nothing you type here is stored or sent anywhere. The whole calculation happens in your browser.
A Worked Example
Working through an example, with abdomen set to 0, chest set to 0, extremity set to 0, the calculator returns injury severity score of 0. Substitute your own figures and the same steps produce the same kind of answer.
Frequently Asked Questions
What do I need to work out injury severity score?
Enter abdomen, chest, extremity, external, face and head and neck. The calculator then works through the relationship and reports injury severity score.
What does the injury severity score (iss) actually calculate?
It takes abdomen, chest, extremity, external, face and head and neck and converts them into injury severity score using the standard relationship for this problem. Each step is applied in turn, so every output is traceable back to the numbers you typed in.
How should I enter abdomen?
Use the value you actually have, in the unit shown next to the field. Enter every value in the same unit system. The calculator assumes the figures you supply are consistent, so it cannot correct a mistake that happens before the calculation starts.
Is the answer exact?
It is as exact as the formula and the inputs allow. The method itself is the standard one for this problem, so the only sources of error are the figures you enter and the precision you ask for.
Why does a small change in one value move the answer so much?
That happens when an output depends on a ratio, because dividing by a small number magnifies any change in it. Check the units first, then check whether the value you entered is in the range the relationship was designed for.