What is the post-process curved formula?

[Pax_Empyrean]

I'm in the process of creating a spreadsheet to aid in the creation of weapon mods, but in order to make it accurate for a given range and skill of shooter, I need to know what the formula is for the "post-process curved" stage of the accuracy calculation. Does anyone know what it is?

[Naeem]

I also would like to know. I saw the same thing last night.