Your room measurement is 15x15 how much tile you need tile is 12x12?

Answer 1

First of all, assuming you're talking about porcelain or ceramic tile, your tiles are not exactly 12 inches by 12 inches. They're a quarter of an inch smaller, in both directions. Or 11-3/4" x 11-3/4". This is so you can space them a quarter inch apart and still have everything on a square-foot basis. Also, you need to be more precise about the measurements of your room. Is it exactly 15 x 15, down to the sixteenth of an inch? Are you measuring the walls? Or the floor area, not including the width of the trim (baseboards and/or quarter-round). If you laid out a 15 x 15 grid of tiles, with a quarter-inch spacing between them, it would cover an area of 14' 11-3/4" square. Your tile should be overlapped about a quarter inch by the trim, so say 14' 11". If either dimension of your room (not including the width of the trim) is larger than this, you will need to use 16 tiles in that direction. Assuming that both dimensions are smaller than 14' 11", you will need a 15 x 15 - tile layout, for a total of 225 tiles. If one dimension is smaller than that, but the other one is larger, you will need 15 x 16 = 240 tiles. If both dimensions are larger than 14' 11", you need a 16 x 16 grid, for a total of 256 tiles. However, either way, you need to buy around 10% more than what you think you need, because you're going to have problems that result in tiles getting wasted. If you're talking about the cheap linoleum or plastic tile that is meant to be butted right up against each other, then you can assume they are exactly 12 inches, but you still want at least a quarter-inch overlap by the trim, so your cutoff is 14' 11-1/2".