How many 18 inch by 18 inch tiles do you need to cover 121 square feet?

Answer 1

53.77 is the text book answer, but you will need at least 10 to 20 more tiles depending on the layout of the floor. A good layout is a balanced layout that starts at the center of the main entrance. There will be corners and side cuts. Cuts around doors, vanities, kitchen islands, closets, etc. There is also the damage and waste factors. Tiles do break!

I have laid many floor tiles and I found it best to set up a floor plan drawing of the floor and account for all of the cuts before I start then add in 20% more for waste. It happens.