Tips on Measuring for Resilient Tile
Enter the size of the rooms to be covered and then select the size of the tile you plan to use. The calculator will determine how many tiles you need, including a standard 10 percent waste allowance.
Homeowner Tip – Individual tiles are commonly 12 inches square, but also in 9-by-9-inch or 6-by-6-inch sizes. Tiles are sold by the box, with the number of tiles enclosed and the number of square feet they will cover listed on the box.
Tile Calculator: How to Calculate the Number of Tiles Needed 
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