fathom | 1 ftm | 2 ftm | 3 ftm | 4 ftm | 5 ftm | 6 ftm | 7 ftm | 8 ftm | 9 ftm | 10 ftm | 11 ftm | 12 ftm | 13 ftm | 14 ftm | 15 ftm | 16 ftm | 17 ftm | 18 ftm | 19 ftm | 20 ftm | 21 ftm | 22 ftm | 23 ftm | 24 ftm | 25 ftm | 26 ftm | 27 ftm | 28 ftm | 29 ftm | 30 ftm | 31 ftm | 32 ftm | 33 ftm | 34 ftm | 35 ftm | 36 ftm | 37 ftm | 38 ftm | 39 ftm | 40 ftm | 41 ftm | 42 ftm | 43 ftm | 44 ftm | 45 ftm | 46 ftm | 47 ftm | 48 ftm | 49 ftm | 50 ftm | 51 ftm | 52 ftm | 53 ftm | 54 ftm | 55 ftm | 56 ftm | 57 ftm | 58 ftm | 59 ftm | 60 ftm | 61 ftm | 62 ftm | 63 ftm | 64 ftm | 65 ftm | 66 ftm | 67 ftm | 68 ftm | 69 ftm | 70 ftm | 71 ftm | 72 ftm | 73 ftm | 74 ftm | 75 ftm | 76 ftm | 77 ftm | 78 ftm | 79 ftm | 80 ftm | 81 ftm | 82 ftm | 83 ftm | 84 ftm | 85 ftm | 86 ftm | 87 ftm | 88 ftm | 89 ftm | 90 ftm | 91 ftm | 92 ftm | 93 ftm | 94 ftm | 95 ftm | 96 ftm | 97 ftm | 98 ftm | 99 ftm | 100 ftm |
x unit | 18 249 675 681 070 xu | 36 499 351 362 140 xu | 54 749 027 043 209 xu | 72 998 702 724 279 xu | 91 248 378 405 349 xu | 1.0949805408642 × 1014 xu | 1.2774772976749 × 1014 xu | 1.4599740544856 × 1014 xu | 1.6424708112963 × 1014 xu | 1.824967568107 × 1014 xu | 2.0074643249177 × 1014 xu | 2.1899610817284 × 1014 xu | 2.3724578385391 × 1014 xu | 2.5549545953498 × 1014 xu | 2.7374513521605 × 1014 xu | 2.9199481089712 × 1014 xu | 3.1024448657819 × 1014 xu | 3.2849416225926 × 1014 xu | 3.4674383794033 × 1014 xu | 3.649935136214 × 1014 xu | 3.8324318930246 × 1014 xu | 4.0149286498353 × 1014 xu | 4.197425406646 × 1014 xu | 4.3799221634567 × 1014 xu | 4.5624189202674 × 1014 xu | 4.7449156770781 × 1014 xu | 4.9274124338888 × 1014 xu | 5.1099091906995 × 1014 xu | 5.2924059475102 × 1014 xu | 5.4749027043209 × 1014 xu | 5.6573994611316 × 1014 xu | 5.8398962179423 × 1014 xu | 6.022392974753 × 1014 xu | 6.2048897315637 × 1014 xu | 6.3873864883744 × 1014 xu | 6.5698832451851 × 1014 xu | 6.7523800019958 × 1014 xu | 6.9348767588065 × 1014 xu | 7.1173735156172 × 1014 xu | 7.2998702724279 × 1014 xu | 7.4823670292386 × 1014 xu | 7.6648637860493 × 1014 xu | 7.84736054286 × 1014 xu | 8.0298572996707 × 1014 xu | 8.2123540564814 × 1014 xu | 8.3948508132921 × 1014 xu | 8.5773475701028 × 1014 xu | 8.7598443269135 × 1014 xu | 8.9423410837242 × 1014 xu | 9.1248378405349 × 1014 xu | 9.3073345973456 × 1014 xu | 9.4898313541563 × 1014 xu | 9.672328110967 × 1014 xu | 9.8548248677777 × 1014 xu | 1.0037321624588 × 1015 xu | 1.0219818381399 × 1015 xu | 1.040231513821 × 1015 xu | 1.058481189502 × 1015 xu | 1.0767308651831 × 1015 xu | 1.0949805408642 × 1015 xu | 1.1132302165453 × 1015 xu | 1.1314798922263 × 1015 xu | 1.1497295679074 × 1015 xu | 1.1679792435885 × 1015 xu | 1.1862289192695 × 1015 xu | 1.2044785949506 × 1015 xu | 1.2227282706317 × 1015 xu | 1.2409779463127 × 1015 xu | 1.2592276219938 × 1015 xu | 1.2774772976749 × 1015 xu | 1.295726973356 × 1015 xu | 1.313976649037 × 1015 xu | 1.3322263247181 × 1015 xu | 1.3504760003992 × 1015 xu | 1.3687256760802 × 1015 xu | 1.3869753517613 × 1015 xu | 1.4052250274424 × 1015 xu | 1.4234747031234 × 1015 xu | 1.4417243788045 × 1015 xu | 1.4599740544856 × 1015 xu | 1.4782237301666 × 1015 xu | 1.4964734058477 × 1015 xu | 1.5147230815288 × 1015 xu | 1.5329727572099 × 1015 xu | 1.5512224328909 × 1015 xu | 1.569472108572 × 1015 xu | 1.5877217842531 × 1015 xu | 1.6059714599341 × 1015 xu | 1.6242211356152 × 1015 xu | 1.6424708112963 × 1015 xu | 1.6607204869773 × 1015 xu | 1.6789701626584 × 1015 xu | 1.6972198383395 × 1015 xu | 1.7154695140206 × 1015 xu | 1.7337191897016 × 1015 xu | 1.7519688653827 × 1015 xu | 1.7702185410638 × 1015 xu | 1.7884682167448 × 1015 xu | 1.8067178924259 × 1015 xu | 1.824967568107 × 1015 xu |
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.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
fathom | ftm | ≡ 6 ft | = 1.8288 m | Imperial/US |
fathoms | x units | fathoms | x units |
---|---|---|---|
1 | ≈ 18249675681070 | 4 | ≈ 72998702724279 |
1.5 | ≈ 27374513521605 | 4.5 | ≈ 82123540564814 |
2 | ≈ 36499351362140 | 5 | ≈ 91248378405349 |
2.5 | ≈ 45624189202674 | 5.5 | ≈ 1.0037321624588E+14 |
3 | ≈ 54749027043209 | 6 | ≈ 1.0949805408642E+14 |
The x unit (symbol xu) is a unit of length approximately equal to 0.1 pm (10−13 m). It is used to quote the wavelength of X-rays and gamma rays.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
x unit | xu | ≈ 1.0021×10−13 m | ≈ 1.0021×10−13 m | Metric system Non-SI |
x units | fathoms | x units | fathoms |
---|---|---|---|
1 | ≈ 5.4795494313211E-14 | 4 | ≈ 2.1918197725284E-13 |
1.5 | ≈ 8.2193241469816E-14 | 4.5 | ≈ 2.4657972440945E-13 |
2 | ≈ 1.0959098862642E-13 | 5 | ≈ 2.7397747156605E-13 |
2.5 | ≈ 1.3698873578303E-13 | 5.5 | ≈ 3.0137521872266E-13 |
3 | ≈ 1.6438648293963E-13 | 6 | ≈ 3.2877296587927E-13 |
fathoms | x units |
---|---|
1 | ≈ 18 249 675 681 070 |
5.4795494313211 × 10-14 | ≈ 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |