Here is the power enrichment calculator I use, figured I would share for anyone who is decent with Excel. You can change the RPM and row axis to whatever you want, some people have Aircharge I have pressure ratio in my tune. Won't change the actual math it is doing within the graphs. Left side is if you want to just see what your current tune is commanding (make sure you input your FA Stoich from your own tune in the yellow highlighted cell, VERY IMPORTANT). The right side is if you want to command a certain AFR, just type it in, and the bottom graph will update and can be copied and pasted into your FA Power Enrich once you are done.
FA Power Enrich.xlsx