How does a planer affect the overall measurements of a project?
For example, let's say I'm working on a cabinet that has an overall length of 53 1/4". There are 4 dividers and three "cavities" (not sure what you would call the space between the dividers). These three cavities are each 16 3/4" wide. I guess the formula would look something like this:
3/4" + 16 3/4" + 3/4" + 16 3/4" + 3/4" +16 3/4" + 3/4" = 53 1/4"
Since the thickness of the boards are 3/4" and obviously factor into the overall length, how would planing affect the length? Would I plane down first then take the final thickness and work off of that? If so, what if the dividers are different widths?
Math makes my head hurt. I hope my question makes sense. I'm still working on my first cup of coffee.
Of course, I could very well be overthinking this...