Purdue first year engineering GPA questions (and what are my chances?)

Okay I go to a catholic school that’s known for rigorous curriculum. It has a 93-100 grading scale. I am currently a junior and I am stressing about college stuff. I I am in pretty much all honors classes excluding English, and I’m in AP US history. Now according to naviance, my unweighted GPA is 3.69 and my weighted is 3.92. When I first saw 3.69 my heart dropped as I saw first year engineering at Purdue had an average of a 3.92 GPA (I assume its unweighted). However then I remembered my friend that goes to a public school is on a 90-100 A scale. When i re calculated my GPA using this calculator,

http://gpacalculator.net/high-school-gpa-calculator/

my GPA came out to be 3.93 unweighted. Now at this point I don’t know what to think, would Purdue look at my percentages and compare them to a 90-100 or would they compare them to a 93-100? Here’s some other stuff about me. I’m in Engineering club, Ecology club, and another school leadership club. I plan to get a job within the month, and possibly start a debate club. If it matters I take an engineering class also, and I want to go into Aerospace engineering if that’s possible. I have somewhere around 30-40hrs of service. On a side note I haven’t taken my ACT or SAT yet. Also sadly my math grades are a b+, or 90% average at least on my 93-100 grading scale, but my science classes throughout high-school are probably like a 96% average. If anyone can please tell me, how good of a chance you think I have to get into Purdue.