First we need to calculate the square footage of the room. 15*20 = 300 square feet Now we need to know how many square feet each tile covers. 20" = 1.667~ square feet 1.6672 = 2.78 square feet. Now we divide the area of the tiles into the area of the room. 300/2.78 = 108 tiles. This gives the exact number of tiles you need mathematically. Realistically you need to account for cutting and breaking. It's safe to round that up to 120 tiles.
You will need at least 17 30-inch tiles to cover 104 square feet. Each tile covers 6.25 square feet so you divide 104 by 6.25 which gives you 16.64 tiles. Add more tiles to allow for extras in case of damage to tiles during installation.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
76.6 tiles
67 tiles.
Each tile covers 4 square feet. You will need 24.75 tiles to cover the area.
Each tile covers 4 square feet. Which means you need 200 tiles to cover 800 square feet, plus spoilage.
Each tile covers 2.25 square feet. This works out to 48 tiles plus spoilage.
Each tile covers 81 square inches. You have 1,296 square inches to cover. It will take 16 tiles to cover that area.
A 24 inch tile covers 4 square feet. Doing the math gives an answer of 175 tiles, plus some for spoilage and trim.
192 tiles
First we need to calculate the square footage of the room. 15*20 = 300 square feet Now we need to know how many square feet each tile covers. 20" = 1.667~ square feet 1.6672 = 2.78 square feet. Now we divide the area of the tiles into the area of the room. 300/2.78 = 108 tiles. This gives the exact number of tiles you need mathematically. Realistically you need to account for cutting and breaking. It's safe to round that up to 120 tiles.
Each 12 inch tile covers one square foot. That would mean they would cover 14 square feet.
You will need at least 17 30-inch tiles to cover 104 square feet. Each tile covers 6.25 square feet so you divide 104 by 6.25 which gives you 16.64 tiles. Add more tiles to allow for extras in case of damage to tiles during installation.
864 tiles.144 tiles per square foot.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
500/1.78 = 281 tiles