quality:correction, linguistic:paraphrasing
Equivalence to other units of area

1 international acre is equal to the following metric units:

1 United States survey acre is equal to:

1 acre (both variants) is equal to the following customary units:

Perhaps the easiest way for US residents to envision an acre is as a rectangle measuring 88 yards by 55 yards (1 ⁄ 10 of 880 yards by 1 ⁄ 16 of 880 yards), about 9 ⁄ 10 the size of a standard American football field. To be more exact, one acre is 90.75% of a 100-yd-long by 53.33-yd-wide American football field (without the end zone). The full field, including the end zones, covers about 1.32 acres (0.53 ha).

For residents of other countries, the acre might be envisioned as rather more than half of a 1.76 acres (0.71 ha) football pitch.