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

Quick Reference

1 Perch = 0.183333 Shackle

1 Shackle = 5.4545 Perch

Perch to Shackle Conversion Formula

To convert Perch to Shackle, multiply by 0.183333.

Shackle = Perch × 0.183333

Perch = Shackle × 5.4545

To convert Shackle back to Perch, divide by 0.183333 (or multiply by 5.4545).

About These Units

About Perch

A linear measure of 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.

Perch to Shackle Conversion Table

Perch	Shackle	Shackle	Perch
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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