I have 110 tiles. And they are 12"x12" how many square feet is that?

If you go to the tile store and tell the counter sales guy that you want to tile a 5 x 5 bathroom, he will sell you the right amount. Most places will let you buy extra and return any unused portion.

5 ft x 5 ft = 25 square feet. Typically, some extra is needed to cut tiles to fit to the walls, cabinets, tub, etc., so there will be some scrap. The amount of scrap can be difficult to predict without knowing if you will make mistakes, the type and size of tile, and what is in the room. A general rule is to add 10% if the room is simple, 25% if the room is complex.

5 ft x 5 ft = 25 square feet. Typically, some extra is needed to cut tiles to fit to the walls, cabinets, tub, etc., so there will be some scrap. The amount of scrap can be difficult to predict without knowing if you will make mistakes, the type and size of tile, and what is in the room. A general rule is to add 10% if the room is simple, 25% if the room is complex.

Four feet by 10 1/2 inches by 4 feet 101/2 inches

15X34

25 pieces 12inches by 12inches

233

You need to also include the size of the tile you are buying in order to determine how many will be needed