It depends on how many square feet the box will cover.
I found two different brands: one covered 22.93 sqft, the other 17.59 sqft.
your room is 12' x 14' = 168 sq.ft
so 168 sqft / (22.93 sqft / box) = 7.32 boxes for my first example
and 168 sqft / (17.59 sqft / box) = 9.55 boxes for my 2nd example
Hope this helps
10x12 room
Two squares.
The square feet of a 14ft x 30ft area is420ft2
Assuming you use the standard 4" depth, you will need at least 1.75 cubic yards.
(13 ft 5 inches) x (14 ft 9 inches) is equal to about 18.4 square meters.
10x12 room
14ft x 12ft = 168 sq ft = 15.6 m2
Volume = 2,111.15026 ft3
168ft² = 15.61m²
There is a total of about 18.67 sq. yards in the room.
Divide them by 3 because 3 feet = 1 yard
How to convert 12 ft x 14 ft into square feet
You have to multiply the two dimensions to get the area. In this case the answer will be 168 square feet.
14 x 12 = 168.
Area = 1/2*12*14 = 84 square feet
168
triangles don't have volume or diameter, so I'm not sure what you're trying to ask.