Perch (unit) - Area

Area

As a unit of area, a square perch (the perch being standardized to equal 16½ feet, or 5½ yards) is equal to a square rod, 30+1⁄4 square yards (25.29 square metres) or 0.00625 acres, or 1/160 acre. There are 40 square perches to a rood (A rectangular area with edges of one furlong (10 chains i.e. 40 rods) and one rod respectively), and 160 square perches to an acre (an area one furlong by one chain (i.e. 4 rods)). This unit was usually referred to as a perch or pole even though square perch and square pole were the more precise terms. Confusingly, rod was used as a unit of area but it meant a rood.

Perches were used as a measure in Queensland real estate until the early 21st century .

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