Most people do not need to think about altitude adjustment until they actually do. If your test location is high enough, it can affect how the aerobic event should be handled under current standards, which is why the calculator includes altitude adjustment support.
Running at elevation is not the same as running at lower altitude, and people want to know whether that changes scoring.
If you are near a score cutoff, even a small change in outcome can feel important.
It is easier to prep well when you know whether altitude needs to be part of the conversation before test day.
If your test is at altitude, it makes sense to check the score in the same conditions you expect to test under. That is easier than finding out late that you were planning against the wrong result.
The Air Force PT Calculator includes altitude adjustment support so you can account for that without doing extra manual work.
Open the Calculator Page