How to Calculate Backsplash Tile
- 1). Find the total backsplash area in square inches. To find this number, multiply the height times the width of each section and add all wall totals together. For our example, we'll use one wall that is 8 feet long by 22 inches high and a second wall that is 6 feet long by 22 inches high. Because we're estimating, we'll always round up to the next whole number:
8 feet X 12 inches = 96 inches. 96 inches X 22 inches = 2112 square inches.
6 feet X 12 inches = 72 inches. 72 inches X 22 inches = 1584 square inches.
2112 + 1584 = 3696 square inches total area to be covered. - 2). Add 7 percent to the total area; this will be your minimum waste allowance:
3696 X 0.07 = 259.
3696 + 259 = 3955 square inches of material needed. - 3). Multiply the length times the width of your chosen backsplash tile. For our example, we'll use a tile that is 8 inches tall/long by 6 inches wide:
8 X 6 = 48 square inches of area per tile. - 4). Divide the area per tile into the total material needed:
3955 divided by 48 equals 83 tiles required for the backsplash.
Source...