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If it's really square you should need 156 18" tiles to cover 350 square feet. Most tile stores let you return unused tiles, so I suggest you get a few extra. The number needed can change based on the grout space, how many you break and if the area isn't square you may need more. A rule of thumb is to add 10% for waste. That rule would say to buy about 175.
What else can I help you with?
How many 18x18 tiles cover 85 square feet?
start with 38 tiles.
How many 18x18 tiles does it take to cover 300 square feet?
118
How many 18x18 tiles are needed for 221 square feet?
The answer depends on the measurement units used for 18x18.
How many 18x18 square inch tiles are needed for 50 square feet?
22.2 tiles so buy 23 tiles.
How many 18x18 square feet vinyl tiles it take to cover 249 square feet?
18 inches = 1.5 ft, so each tile is 2.25 sq ft, number required = 249/2.25 = 111
How many 18x18 tiles to cover 150 square feet?
67 tiles.
How many 18X18 square feet vinyl tiles it take to cover 288 square feet?
192 tiles
How many 18x18 tiles cover 85 square feet?
start with 38 tiles.
How many 18X18 square feet ceramic tiles does it take to cover 249 square feet?
10
How many 18x18 tiles does it take to cover 300 square feet?
118
How many 18x18 tiles do you need to cover 648 square feet?
288
How many 18x18 tiles do you need to cover a room that is 730 square feet?
12...
How may tiles do you need to by to cover 500 square feet if the tile is 18x18?
The answer will depend on the units used for measuring the tiles which you have failed to specify.
How many 18x18 square feet ceramic tiles it takes to cover 247 square feet?
It is not clear what is meant by an "18x18 square feet" tile. 18ft * 18 ft = 324 square feet, so that one tile will be more than enough. An 18 inch by 18 inch tile cannot be a 18x18 square feet tile.
How many 18x18 square inch tiles for 340 square feet?
220
How many 18x18 tiles are needed for 221 square feet?
The answer depends on the measurement units used for 18x18.
How many 18x18 inch tiles do you need to cover 90 square feet?
18" x 18" = 1.5' x 1.5' = 2.25 square feet90/2.25 = 40 tiles.
