No, a parcel of land measuring 400 feet by 400 feet is significantly larger than 1 acre. Multiplying 400 feet by 400 feet yields a total area of 160,000 square feet. Dividing this grand total by the standard conversion factor of 43,560 square feet per acre reveals that a 400-foot by 400-foot plot spans approximately 3.67 acres. A true 1-acre square plot measures roughly 208.71 feet on each side, meaning dimensions of 400 feet on each side encompass nearly four times the total land area of a single standard acre.