Convert square millimeter to acre (international)
Selected category: area.
Definition and details for square millimeter:
Square millimeter (mm2) is a metric unit of area equal to 10-6 m2.
Definition and details for acre (international):
Acre (ac or A) is a unit of area often used to express land. Originally, an acre was understood as a selion of land sized at one furlong (660 ft) long and one chain (66 ft) wide, this may have also been understood as an approximation of the amount of land an ox could plow in one day. International acre equals to 4046.8564224 m2 exactly.