If using an app, drop in the numbers and see the result. In the absence of an app or E6B, check the POH for a density altitude chart. You can find the ambient DA by adjusting for field elevation ...

That is considered zero-density altitude. Any temperature or vapor-pressure ... power curve with three different sets of numbers in the chart below. The first column represents the observed ...

Effectively, this concept of density altitude gives us a snapshot of what ... yields results very close to the standard aerospace atmosphere chart at elevations under 15,000 feet.