I have been there several times worrying about it with my kids birthday party. The kids are really interested in having fun but its the adults who will be interested in the eating. You can't put a notice that each person regardless of a kid or parent to take just 2 slices. So, its best to have a varieties of food like hot dogs or corn dogs, pizzas say large box of pizzas of maybe 8 - 10 (usually there are leftovers) salads, snacks, cookies and best of all for kids is party favors to take home. *
Most pizzas have 8 slices( you might want to call the pizza place you are ordering from and ask), so 2 X 40= 80 which would equal about 10 pizzas, so probably 11-12 pizzas just to be on the safe side.
well if you get 8 slice pizzas, and you allow for 2.5 slices each - adults might want more and kids can be greedy, 2.5 x 40 = 100 slices. = 12.5 pizzas = 13 pizzas although 12 will probably do! you can always have left overs the next day - cold pizza is heaven.
I'm having a kids party and I'm having about 40 total kids plus adults. I say 2 slices per person. How many boxes should I get?! Help!!!