1. One square yard equals nine square feet. Or, 1 sq. yd. = 9 sq. ft. 2. Divide the number of square feet by nine, and you'll get the number of square yards of carpet you'll need.
http://www.ehow.com/how_2299984_convertsquarefee...

there is 200 squared yards in 1800 squared feet. 9/1800=200 squared yards.
http://wiki.answers.com/Q/How_many_square_yards_in...

1 Det
http://www.wikihow.com/ConvertFeettoYards
