Acre (ac)
Definition: An acre is an imperial unit of area equal to 4,047 square meters or 0.4047 hectares.
History: Historically, an acre represented the area a team of oxen could plow in a day. It was formalized over centuries.
Current Use: Still widely used in the US and UK for real estate, agriculture, and land ownership.
Square Mile (mi²)
Definition: A square mile (mi²) is an imperial unit of area equal to a square with sides of one mile.
History: Historically used in land surveying and property measurement in English-speaking countries.
Current Use: Commonly used to measure large geographical areas such as cities and national parks.
Quick Conversion Table Acre (ac) to Square Mile (mi²)
1 Acre (ac) equal to 0.0015625 Square Mile (mi²)
5 Acre (ac) equal to 0.0078125 Square Mile (mi²)
10 Acre (ac) equal to 0.015625 Square Mile (mi²)
20 Acre (ac) equal to 0.03125 Square Mile (mi²)
30 Acre (ac) equal to 0.046875 Square Mile (mi²)
50 Acre (ac) equal to 0.078125 Square Mile (mi²)
75 Acre (ac) equal to 0.1171875 Square Mile (mi²)
100 Acre (ac) equal to 0.15625 Square Mile (mi²)