How many square yards of carpet are needed for a 1600 square foot house?

1600 sq ft = 1600/9 sq yd = 177 7/9 sq yd. Almost 178 square yards are needed if all floors are to be carpeted. If it is a two floor house, additional carpeting may be needed for the stair risers, but usually the kitchen and bathroom(s) are not carpeted so their areas may be subtracted.