Use this free online calculator to convert Rod [International] to Shackle instantly. This all length conversions conversion tool provides accurate results for all your measurement needs.

Quick Reference

1 Rod [International] = 0.183333 Shackle

1 Shackle = 5.4545 Rod [International]

Rod [International] to Shackle Conversion Formula

To convert Rod [International] to Shackle, multiply by 0.183333.

Shackle = Rod [International] × 0.183333

Rod [International] = Shackle × 5.4545

To convert Shackle back to Rod [International], divide by 0.183333 (or multiply by 5.4545).

About These Units

About Rod [International]

The rod is a traditional unit of distance equal to 5.5 yards (16 feet 6 inches or exactly 5.0292 meters). The rod and the furlong were the basic distance units used by the Anglo-Saxon residents of England before the Norman conquest of 1066. The Saxons generally called this unit the gyrd, a word which comes down to us as the name of a different unit, the yard. "Rod" is another Saxon word which meant just what it means today: a straight stick. The Normans preferred to call the gyrd a pole or a perch (a word of French origin, meaning a pole; see perche). The length of the rod was well established at least as early as the eighth century. It may have originated as the length of an ox-goad, a pole used to control a team of 8 oxen (4 yokes). Scholars are not sure how the rod was related to shorter units. It may have been considered equal to 20 "natural" feet (actual foot lengths; see foot), or it may have been measured "by hand" as 30 shaftments. In any case, when the modern foot became established in the twelfth century, the royal government did not want to change the length of the rod, since that length was the basis of land measurement, land records, and taxes. Therefore the rod was redefined to equal 16.5 of the new feet. This length was called the "kings perch" at least as early as the time of King Richard the Lionheart (1198). Although rods and perches of other lengths were used locally in Britain, the kings perch eventually prevailed. The relationship between the rod and the other English distance units was confirmed again by the Parliamentary statute of 1592, which defined the statute mile to be either 320 rods or 1760 yards, thus forcing the rod to equal exactly 5.5 yards or 16.5 feet.

About Shackle

The shackle is a traditional unit of length used for measuring the lengths of nautical cables and chains, especially anchor chains. Anchor chains are formed by using shackles to join short lengths of chain. When the anchor is dropped and the chain runs out, a seaman counting the number of shackles can report the total length of chain deployed. The size of the unit therefore varied somewhat, depending on the length of the short chains used. In Britain, the unit became standardized in the 16th century at 12.5 fathoms (75 feet or 22.86 meters). In 1949, the Royal Navy adopted a length of 15 fathoms, which is 90 feet or 27.432 meters; this brought the British shackle in line with the U.S. unit, which is usually called the shot.

Rod [International] to Shackle Conversion Table

Rod [International]	Shackle	Shackle	Rod [International]
0.1	0.018333	0.1	0.545455
0.5	0.091667	0.5	2.7273
1	0.183333	1	5.4545
2	0.366667	2	10.9091
5	0.916667	5	27.2727
10	1.8333	10	54.5455
20	3.6667	20	109.0909
25	4.5833	25	136.3636
50	9.1667	50	272.7273
100	18.3333	100	545.4545
250	45.8333	250	1363.64
500	91.6667	500	2727.27
1000	183.3333	1000	5454.55

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