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18"*18" = 1.5 ft * 1.5 ft = 2.25 sq ft

To cover 120 sqft you would require 120/2.25 = 53.33 ir 54 tiles.

That answer is correct as a mathematical exercise, but in real life, the number of tiles depends upon the exact dimensions of the 120 sq ft area. It also assumes that all offcuts can be used and that there is no wastage. These are rather unrealistic assumptions so you should allow 5-10% extra.

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13y ago
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Q: How many 18 X 18 inch tiles does it take to cover 120 sq feet?
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