The answer is 4840. To find out how many sq. yards in acres, multiply by the factor or instead, use the converter below. 1 Acre = 4840 Square Yards. Acre and square yard are U.S. customary and imperial area measurement units. Acre (43560 sq. feet) is mostly replaced by metric unit hectare in rest of the world except united states. It is used for measuring the land but sq. yard is mostly used for measuring the smaller areas, office spaces, etc.