400
6.75 Tiles
75 tiles would do it (a 12*12 inch time = 1 square foot) but you need 10% over this for waste so you need to get 83 tiles.
342 of them.
5,290 Pieces
A 12 inch by 12 inch tile is 1 ft by 1 ft, which is 1 square foot. So you would need 120 tiles.
If these are one inch tiles you need 2160. If the tiles are 12 inch tiles you need 180.
first put both in terms of the same mesurment. tiles in inches, patio in inches. patio is 240 by 360 inches. how many tiles will fit in the 240 inch measurement? 15 how many tiles will fit in the 360 inch measurement? 22.2 so you call it 23. 23X15=345 tiles you will need in a 20x30 area.
It takes 4 6x6 inch tiles to cover a square foot. You will need 180 tiles, plus some for spoilage and mistakes.
Each tile is 12 inch x 12 inch = 1 foot x 1 foot = 1 square foot. To cover 240 square feet you would need 240 tiles
80 if the tiles are 12x12 - 12x12 is one square foot covering 80 you would need 80 tiles
12 inches = 1 foot Thus the tiles would be 1 foot square. You therefore need 30 to cover a 30 square foot room.
You would need 56 tiles to do the floor