776. You need four tiles for one square foot (tiles are 36 square inches, a square foot is 144 square inches) so 4 tiles times 194 sqft is 776. You will want some spares too.
49 tiles because a square has the same length as it does breadth. The Area of a square is length times breadth, so if length eqauls seven then so does the breadth which means that the area will be 7x7 which eqauls 49.
1 and 1/3 tiles of 9 x 12 tiles will equal 1 square feet. Therefore, it will take 25 times 1-1/3 tiles or approx. 34 9x12 tiles to tile a 25 square foot area.
I Cover Times Square - 1950 was released on: USA: 5 October 1950
Assuming no gap for grouting the spaces between the tiles, the area is 18 times 30 = 540 square inches, and as each tile measure 1 square inch, the number needed is 540. However, that's just the answer to the mathematical question. For a real - practical - answer you can assume that the tiles will be spaced approximately one-eighth of an inch apart, which means that 8 tiles will cover 9 linear inches. this means that you will need 16 tiles in one direction and 27 in the other. That is a total of 432 - which is quite a financial saving.
Get your sq. footage by multiplying length times width, then find out how many tiles it takes to measure to a foot length. In this case 4 tiles = 3'. and 3 x 3 is 9 so divide 9 into your sq. footage and then you have your answer.
In practice you will use more tiles than the equivalent area of the room. A 15 foot strip of tiles will require 15 times 12/13 = 13.846 tiles to cover it. This will have to be rounded to 14 tiles. That means that the 15 foot by 15 foot room will require 14 times 14 tiles = 196 tiles to cover it. And that's if you don't drop and break any or mess up one or more cuts.
You can fit nine 4x4 tiles in one squre foot (3 tiles wide by 3 tiles long). 56 square feet times 9 = 504. Add about 10% for cutting a/o waste (50 tiles) and you should buy around 550 tiles to complete the job. Good luck.
What kind of tiles? For the floor or walls also? Simplest example. 12x12 floor tiles. 10x12 room. One length times one width. 10x12=120 12x20 room, 240 tiles. 6x6 tiles there are 4 tiles in each square foot of floor space 10x12x4=480 Whatever you are doing, one length times one width gives you the square footage. Then figure how much each tile covers and multiply.
You multiply 8 times 8 time 25 and divide by 144. The answer is 11.111....square feet.
tiles that were made in the medieval times
Nine in each square foot. (27 times 9 equals 243).