one 12 x 12 tile is one sq ft you need 480/1 = 480 tiles
If you mean "how many 3x5-inch cards cover 300 sq. ft": 1 card = 3*5 =15 sq. in. = 15/144 sq. ft. (12x12 = 144 in^2 = 1 ft^2) N cards *15/144 = 300 N = (300*144)/15 = 2880
If it's a 12'X12' room then it's 144 sq. ft.
14x14=156 sq ft 12x12=1sq ft assuming no waste (and there always waste) = 156 tiles are needed...(always buy an extra 10-15% fr wastage/broken ones etc )
32 sq. ft.
144 of them.
48
221 of them. Get extra for breakage.
144
204 tiles.
Assuming that the 12x12 is inches.12 in. x 12 in. = 1 ft x 1 ft = 1 square (sq) footGiven that you have 200 square feet to cover:(200 sq ft) / (1 sq ft) = 200 unitsThat means it takes 200 12x12 in. squares to cover a 200 sq ft. space.If you meant 12x12 to be in feet:12 ft x 12 ft = 144 sq ft.200 / 144 ~= 1.39 units (It would take 1.39 squares to cover it)
256 tiles
240 Get extra for breakage.
1 sheet of 12 ft x 12 ft will cover 144 sq ft. More than enough.
One tile that is 12 ft by 12 ft will be more than enough.
12 x 12 ( units inches) is one sq ft you need 180 tiles
362. Get 400 to be safe.