| quarter | 1 qr. | 2 qr. | 3 qr. | 4 qr. | 5 qr. | 6 qr. | 7 qr. | 8 qr. | 9 qr. | 10 qr. | 11 qr. | 12 qr. | 13 qr. | 14 qr. | 15 qr. | 16 qr. | 17 qr. | 18 qr. | 19 qr. | 20 qr. | 21 qr. | 22 qr. | 23 qr. | 24 qr. | 25 qr. | 26 qr. | 27 qr. | 28 qr. | 29 qr. | 30 qr. | 31 qr. | 32 qr. | 33 qr. | 34 qr. | 35 qr. | 36 qr. | 37 qr. | 38 qr. | 39 qr. | 40 qr. | 41 qr. | 42 qr. | 43 qr. | 44 qr. | 45 qr. | 46 qr. | 47 qr. | 48 qr. | 49 qr. | 50 qr. | 51 qr. | 52 qr. | 53 qr. | 54 qr. | 55 qr. | 56 qr. | 57 qr. | 58 qr. | 59 qr. | 60 qr. | 61 qr. | 62 qr. | 63 qr. | 64 qr. | 65 qr. | 66 qr. | 67 qr. | 68 qr. | 69 qr. | 70 qr. | 71 qr. | 72 qr. | 73 qr. | 74 qr. | 75 qr. | 76 qr. | 77 qr. | 78 qr. | 79 qr. | 80 qr. | 81 qr. | 82 qr. | 83 qr. | 84 qr. | 85 qr. | 86 qr. | 87 qr. | 88 qr. | 89 qr. | 90 qr. | 91 qr. | 92 qr. | 93 qr. | 94 qr. | 95 qr. | 96 qr. | 97 qr. | 98 qr. | 99 qr. | 100 qr. |
| fathom | 0.125 ftm | 0.25 ftm | 0.375 ftm | 0.5 ftm | 0.625 ftm | 0.75 ftm | 0.875 ftm | 1 ftm | 1.125 ftm | 1.25 ftm | 1.375 ftm | 1.5 ftm | 1.625 ftm | 1.75 ftm | 1.875 ftm | 2 ftm | 2.125 ftm | 2.25 ftm | 2.375 ftm | 2.5 ftm | 2.625 ftm | 2.75 ftm | 2.875 ftm | 3 ftm | 3.125 ftm | 3.25 ftm | 3.375 ftm | 3.5 ftm | 3.625 ftm | 3.75 ftm | 3.875 ftm | 4 ftm | 4.125 ftm | 4.25 ftm | 4.375 ftm | 4.5 ftm | 4.625 ftm | 4.75 ftm | 4.875 ftm | 5 ftm | 5.125 ftm | 5.25 ftm | 5.375 ftm | 5.5 ftm | 5.625 ftm | 5.75 ftm | 5.875 ftm | 6 ftm | 6.125 ftm | 6.25 ftm | 6.375 ftm | 6.5 ftm | 6.625 ftm | 6.75 ftm | 6.875 ftm | 7 ftm | 7.125 ftm | 7.25 ftm | 7.375 ftm | 7.5 ftm | 7.625 ftm | 7.75 ftm | 7.875 ftm | 8 ftm | 8.125 ftm | 8.25 ftm | 8.375 ftm | 8.5 ftm | 8.625 ftm | 8.75 ftm | 8.875 ftm | 9 ftm | 9.125 ftm | 9.25 ftm | 9.375 ftm | 9.5 ftm | 9.625 ftm | 9.75 ftm | 9.875 ftm | 10 ftm | 10.125 ftm | 10.25 ftm | 10.375 ftm | 10.5 ftm | 10.625 ftm | 10.75 ftm | 10.875 ftm | 11 ftm | 11.125 ftm | 11.25 ftm | 11.375 ftm | 11.5 ftm | 11.625 ftm | 11.75 ftm | 11.875 ftm | 12 ftm | 12.125 ftm | 12.25 ftm | 12.375 ftm | 12.5 ftm |
The quarter (lit. "one-fourth") is used as the name of several distinct English units based on ¼ sizes of some base unit.
| 1 quarters = 0.125 fathoms | 4 quarters = 0.5 fathoms |
| 1.5 quarters = 0.1875 fathoms | 4.5 quarters = 0.5625 fathoms |
| 2 quarters = 0.25 fathoms | 5 quarters = 0.625 fathoms |
| 2.5 quarters = 0.3125 fathoms | 5.5 quarters = 0.6875 fathoms |
| 3 quarters = 0.375 fathoms | 6 quarters = 0.75 fathoms |
A fathom is a unit of length in the imperial and the U.S. customary systems equal to 6 feet (1.8288 metres), used especially for measuring the depth of water.
There are two yards (6 feet) in an imperial fathom. Originally the span of a man's outstretched arms, the size of a fathom has varied slightly depending on whether it was defined as a thousandth of an (Admiralty) nautical mile or as a multiple of the imperial yard. Formerly, the term was used for any of several units of length varying around 5–5 1⁄2 feet.
| 1 fathoms = 8 quarters | 4 fathoms = 32 quarters |
| 1.5 fathoms = 12 quarters | 4.5 fathoms = 36 quarters |
| 2 fathoms = 16 quarters | 5 fathoms = 40 quarters |
| 2.5 fathoms = 20 quarters | 5.5 fathoms = 44 quarters |
| 3 fathoms = 24 quarters | 6 fathoms = 48 quarters |
| 1 quarters = 0.125 fathoms |
| 1 fathoms = 8 quarters |