Carpet costs $12 per square yard. how much will it cost to carpet a room that is 180 square feet?

Converting units from feet to yards is easy. However, it becomes tricky when converting square yard to square feet but it is easy if you get the gist of it. Simply square both sides of the conversion:

Since 3 feet = 1 yard
(3 feet)^2 = (1 yard)^2
9 feet^2 = 1 yard^2

In the same way, if you want to convert from cubic feet to cubic yard, simply cube (raise to the power of 3) both sides. :)