Convert from square inch to perch

Unit Definition (square inch)
The square inch is a traditional unit of area. 1 in² equals exactly 6.4516 cm² or 645.16 mm².

Unit Definition (perch)
The perch is a unit of area. A perch of area covers exactly 272.25 square feet or about 25.292 85 square meters. There are 40 perches in a rood and 160 perches in an acre.