No, a lot measuring 200 feet by 200 feet is slightly smaller than 1 acre, though it comes reasonably close. Multiplying 200 feet by 200 feet results in a total area of 40,000 square feet. Because one full acre equals 43,560 square feet, a 200x200 foot parcel covers about 0.918 acres, or roughly 92 percent of a full acre. To achieve an exact square acre, all four sides of the plot must measure approximately 208.71 feet, meaning a 200-foot square misses the mark by a modest margin of 3,560 square feet.