Measuring land for ownership (and taxation) is a very ancient concept, together is the word ‘acre’, which wake up in numerous old languages and also translates together ‘open field’. The area thus explained was initially a strip of floor (a long furrow, which provided rise to the word furlong, an old measure of length) the a ploughman and also his yoke of 2 oxen might turn over in an typical day’s job-related – a strip being less complicated to plough than a square, together there to be fewer transforming points required.

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Acres. later an acre was more accurately measured together an area i beg your pardon is tantamount to 10 chain by one chain. A chain is currently standardised together 66 feet (20.18 m), so the yes, really area extended by an acre is 660 feet through 66 feet, i m sorry (to save you the maths) converts to near sufficient 4,048 square metres. To visualise this, a expert football (soccer) ar covers an area of 2 acres, therefore one team’s half is an acre. Hence a hectare, which is about 2 1⁄2 acres, takes increase both halves that the playing area, to add the land roughly it between players and also spectators.

Roods & perches. These room subdivisions of an acre. Over there are four roods in an acre, and also in turn a rood consists of 40 perches. As a rood is a 4 minutes 1 of an acre, it has 1.012 square metres – about the dimension of two tennis courts. Each of the 40 perches in a rood thus consists of just over 25 square metres – the size of one of the net-side playing areas of the tennis court.

This is why ~ above a land inspection map that offers the dimensions of every parcel’s area that land, girlfriend will never ever find more than the quantity of 3 roods or 39 perches listed – i beg your pardon is advantageous to understand if the numbers are difficult to decipher. Together a additional example, if a landholder owned 4 acres and 3 roods, and also then bought a additional rood, he (or she) would certainly then very own 5 acre in total. Similarly, must the owner have 4 acres 3 roods and also 39 perches, only one extra perch would certainly be compelled to comprise the 5 acre block, as the extra perch would provide a full of 40 perches (a rood), which consequently would make a total of 4 roods (an acre) to add to the 4 acres.

The family member sizes of each unit of measurement are presented in the chart below.


Converting royal measurements to metric –

One (1) chain is 66 feet. Every chain has 100 links, every measuring simply under 8 customs (7.92 inches). Old plan may display measurements in chain & links, or feet & customs (there room 12 inch in a foot). To to compare plans v a contemporary map, the provided dimensions must be converted to a metric equivalent. To carry out this, convert the feet and also inches to an almost right fraction, then multiply this by 0.305 to uncover the indistinguishable in metres.

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For precise conversion of all measurements, over there is a calculator on the Australian Government’s nationwide Measurement Institute’s website,


Gunter’s chain


Invented in 1620, early on surveyors offered this metal chain, with the help of a ‘chainman’, to establish horizontal direct measurements. Each chain measure 66feet, consisted of of 100 links, every 7.92 inches long. Brass tag with different notches were used to show every tenth link. The chain was stretched out indigenous the ‘point the commencement’, in a detailed compass direction, and pegged at its various other end. The chainman then gathered increase the chain from the starting point, and carried it come the pegged end, climate on come the following point. Sloping ground had actually to it is in measured in small horizontal sections.