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Area of each tile = 4*4 = 16 sq inches.

Area to be covered = 120 sq ft = 120*12*12 = 17280 sq inches.

Therefore, minimum number of tiles required = 1080.

However, this assumes that the area to be covered is a shape such that no tiles need to be cut, or that all the offcuts are used. The assumptions are unlikely in real life and you should allow 5% extra.

On the other hand, there are grouting gaps (between tiles), which will increase the effective coverage of each tile.

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10y ago
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Q: How many 4 inch x 4 inch tiles would you need for 120 sq feet?
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