How many 15 inch tiles for 378 square feet?

Answer 1

Convert the tile length to feet : 12 inches = 1 ft then 15 inches = 15/12 = 1.25 feet

Then the area of each tile = 1.25 x 1.25 = 1.5625 sq ft

The number of tiles required = 378 ÷ 1.5625 = 241.92 (round up to 242)

However, the actual dimensions of the area can affect the number of tiles required.

If the length is 21' then a strip of 17 tiles along the length will result in 3" wastage on the final tile.

If the width is 18' then a strip of 15 tiles will result in 9" wastage on the final tile.

If, because of the tile pattern, the wastage cannot be used then the tile requirement increase to 15 x 17 = 255.