Irish acre

A unit of land area, ? – 20th century¹, found in Ireland, Yorkshire, and regions bordering the Solway firth, approximately 6,555 square meters (approximately 1.6198 acres). Sometimes called the Irish plantation acre or simply the plantation acre².

1. United Nations, 1966.

2. Frederic Seebohm.
Customary Acres and their Historical Importance.
London: Longmans, Green and Co., 1914.

sources

“...the Irish perch or pole is 7 yards, and that of England only 5½. Hence 11 Irish miles are equal to 14 English miles.

“The proportion between the land measures of England and Ireland is deduced from the square Perch of each country. Thus 30¼ Irish Acres = 49 English Acres. The former is called plantation measure and the latter statute measure.

“1 Irish Acre = 1 Acre 2 Roods 19 21/121 Perches English; and 1 Acre of the latter = 2 Roods 18 38/49 Perches of the former.”

Kelly, 1835, page 195.