Tile floors and hardwood floors?

i need to know how to make sure i am getting my measurements right for my floors so how do i measure my floor for tile and then how do i measure for laminated hardwoods floors to make sure i am getting enough of tile and hardwood on the kitchen floor i am getting the oversize tile not 12x12 but the next size up then i am getting the 4x4 to do the top of my counter tops thanks for any help i can get oh yea i am doing my living room in the strips that snap together