Calculating how many tiles in a room
· 12"X12" is DUH 144 sq inches & 1 sq foot
· so multiply any tile size by its 2 dimensions ie 12"X12" or 16"X16" divide by 144 & that = the sq ft per tile.
· 13"X13" is 169 sq inches divided by 144 sq inches in a sq foot =1.174 per tile
· 18"X18" is 324 sq inches per tile divided by 144 sq inches per sq ft= 2.25 sq ft per tile
· 20"x20" tiles are 2.778 per tile
· 24X24 tiles are 4 sq ft per tile
Formula would look like this
(Tile L"x W"= sq inches)divided by 144 sq inches=sq ft per tile) room area divided by sq ft per tile= how many tiles
Soooo once you know the sq feet you need, add a little for waste & breakage & ooops cuts & you will have enough..
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288
71.11 (72) plus 20%
You'll need 200 18-inch tiles.
71 and 1/2 Get 80 to be safe.
30 tiles! But you'll need more than 30 tiles to cover wastage, breakage, etc.