| nail (cloth) | 1 nail (cloth) | 2 nail (cloth) | 3 nail (cloth) | 4 nail (cloth) | 5 nail (cloth) | 6 nail (cloth) | 7 nail (cloth) | 8 nail (cloth) | 9 nail (cloth) | 10 nail (cloth) | 11 nail (cloth) | 12 nail (cloth) | 13 nail (cloth) | 14 nail (cloth) | 15 nail (cloth) | 16 nail (cloth) | 17 nail (cloth) | 18 nail (cloth) | 19 nail (cloth) | 20 nail (cloth) | 21 nail (cloth) | 22 nail (cloth) | 23 nail (cloth) | 24 nail (cloth) | 25 nail (cloth) | 26 nail (cloth) | 27 nail (cloth) | 28 nail (cloth) | 29 nail (cloth) | 30 nail (cloth) | 31 nail (cloth) | 32 nail (cloth) | 33 nail (cloth) | 34 nail (cloth) | 35 nail (cloth) | 36 nail (cloth) | 37 nail (cloth) | 38 nail (cloth) | 39 nail (cloth) | 40 nail (cloth) | 41 nail (cloth) | 42 nail (cloth) | 43 nail (cloth) | 44 nail (cloth) | 45 nail (cloth) | 46 nail (cloth) | 47 nail (cloth) | 48 nail (cloth) | 49 nail (cloth) | 50 nail (cloth) | 51 nail (cloth) | 52 nail (cloth) | 53 nail (cloth) | 54 nail (cloth) | 55 nail (cloth) | 56 nail (cloth) | 57 nail (cloth) | 58 nail (cloth) | 59 nail (cloth) | 60 nail (cloth) | 61 nail (cloth) | 62 nail (cloth) | 63 nail (cloth) | 64 nail (cloth) | 65 nail (cloth) | 66 nail (cloth) | 67 nail (cloth) | 68 nail (cloth) | 69 nail (cloth) | 70 nail (cloth) | 71 nail (cloth) | 72 nail (cloth) | 73 nail (cloth) | 74 nail (cloth) | 75 nail (cloth) | 76 nail (cloth) | 77 nail (cloth) | 78 nail (cloth) | 79 nail (cloth) | 80 nail (cloth) | 81 nail (cloth) | 82 nail (cloth) | 83 nail (cloth) | 84 nail (cloth) | 85 nail (cloth) | 86 nail (cloth) | 87 nail (cloth) | 88 nail (cloth) | 89 nail (cloth) | 90 nail (cloth) | 91 nail (cloth) | 92 nail (cloth) | 93 nail (cloth) | 94 nail (cloth) | 95 nail (cloth) | 96 nail (cloth) | 97 nail (cloth) | 98 nail (cloth) | 99 nail (cloth) | 100 nail (cloth) |
| light-year | 6.0408887912143 × 10-18 ly | 1.2081777582429 × 10-17 ly | 1.8122666373643 × 10-17 ly | 2.4163555164857 × 10-17 ly | 3.0204443956071 × 10-17 ly | 3.6245332747286 × 10-17 ly | 4.22862215385 × 10-17 ly | 4.8327110329714 × 10-17 ly | 5.4367999120928 × 10-17 ly | 6.0408887912143 × 10-17 ly | 6.6449776703357 × 10-17 ly | 7.2490665494571 × 10-17 ly | 7.8531554285785 × 10-17 ly | 8.4572443077 × 10-17 ly | 9.0613331868214 × 10-17 ly | 9.6654220659428 × 10-17 ly | 1.0269510945064 × 10-16 ly | 1.0873599824186 × 10-16 ly | 1.1477688703307 × 10-16 ly | 1.2081777582429 × 10-16 ly | 1.268586646155 × 10-16 ly | 1.3289955340671 × 10-16 ly | 1.3894044219793 × 10-16 ly | 1.4498133098914 × 10-16 ly | 1.5102221978036 × 10-16 ly | 1.5706310857157 × 10-16 ly | 1.6310399736278 × 10-16 ly | 1.69144886154 × 10-16 ly | 1.7518577494521 × 10-16 ly | 1.8122666373643 × 10-16 ly | 1.8726755252764 × 10-16 ly | 1.9330844131886 × 10-16 ly | 1.9934933011007 × 10-16 ly | 2.0539021890128 × 10-16 ly | 2.114311076925 × 10-16 ly | 2.1747199648371 × 10-16 ly | 2.2351288527493 × 10-16 ly | 2.2955377406614 × 10-16 ly | 2.3559466285736 × 10-16 ly | 2.4163555164857 × 10-16 ly | 2.4767644043978 × 10-16 ly | 2.53717329231 × 10-16 ly | 2.5975821802221 × 10-16 ly | 2.6579910681343 × 10-16 ly | 2.7183999560464 × 10-16 ly | 2.7788088439586 × 10-16 ly | 2.8392177318707 × 10-16 ly | 2.8996266197828 × 10-16 ly | 2.960035507695 × 10-16 ly | 3.0204443956071 × 10-16 ly | 3.0808532835193 × 10-16 ly | 3.1412621714314 × 10-16 ly | 3.2016710593436 × 10-16 ly | 3.2620799472557 × 10-16 ly | 3.3224888351678 × 10-16 ly | 3.38289772308 × 10-16 ly | 3.4433066109921 × 10-16 ly | 3.5037154989043 × 10-16 ly | 3.5641243868164 × 10-16 ly | 3.6245332747285 × 10-16 ly | 3.6849421626407 × 10-16 ly | 3.7453510505528 × 10-16 ly | 3.805759938465 × 10-16 ly | 3.8661688263771 × 10-16 ly | 3.9265777142893 × 10-16 ly | 3.9869866022014 × 10-16 ly | 4.0473954901135 × 10-16 ly | 4.1078043780257 × 10-16 ly | 4.1682132659378 × 10-16 ly | 4.22862215385 × 10-16 ly | 4.2890310417621 × 10-16 ly | 4.3494399296743 × 10-16 ly | 4.4098488175864 × 10-16 ly | 4.4702577054985 × 10-16 ly | 4.5306665934107 × 10-16 ly | 4.5910754813228 × 10-16 ly | 4.651484369235 × 10-16 ly | 4.7118932571471 × 10-16 ly | 4.7723021450593 × 10-16 ly | 4.8327110329714 × 10-16 ly | 4.8931199208835 × 10-16 ly | 4.9535288087957 × 10-16 ly | 5.0139376967078 × 10-16 ly | 5.07434658462 × 10-16 ly | 5.1347554725321 × 10-16 ly | 5.1951643604443 × 10-16 ly | 5.2555732483564 × 10-16 ly | 5.3159821362685 × 10-16 ly | 5.3763910241807 × 10-16 ly | 5.4367999120928 × 10-16 ly | 5.497208800005 × 10-16 ly | 5.5576176879171 × 10-16 ly | 5.6180265758293 × 10-16 ly | 5.6784354637414 × 10-16 ly | 5.7388443516535 × 10-16 ly | 5.7992532395657 × 10-16 ly | 5.8596621274778 × 10-16 ly | 5.92007101539 × 10-16 ly | 5.9804799033021 × 10-16 ly | 6.0408887912143 × 10-16 ly |
A nail, as a unit of cloth measurement, is generally a sixteenth of a yard or 2 1/4 inches (5.715 cm). The nail was apparently named after the practice of hammering brass nails into the counter at shops where cloth was sold.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| nail (cloth) | ≡ 2 1⁄4 in | = 0.05715 m | Other (Length) |
| nails (cloth) | light-years | nails (cloth) | light-years |
|---|---|---|---|
| 1 | = 6.0408887912143E-18 | 4 | = 2.4163555164857E-17 |
| 1.5 | = 9.0613331868214E-18 | 4.5 | = 2.7183999560464E-17 |
| 2 | = 1.2081777582429E-17 | 5 | = 3.0204443956071E-17 |
| 2.5 | = 1.5102221978036E-17 | 5.5 | = 3.3224888351678E-17 |
| 3 | = 1.8122666373643E-17 | 6 | = 3.6245332747286E-17 |
The light-year is a unit of length used to express astronomical distances. It is about 9.5 quadrillion metres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word "year", the term light-year is sometimes misinterpreted as a unit of time.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| light-year | ly | ≡ Distance light travels in vacuum in 365.25 days | = 9.4607304725808×1015 m | Science - Astronomy (Length) |
| light-years | nails (cloth) | light-years | nails (cloth) |
|---|---|---|---|
| 1 | = 1.6553855476604E+17 | 4 | = 6.6215421906417E+17 |
| 1.5 | = 2.4830783214907E+17 | 4.5 | = 7.449234964472E+17 |
| 2 | = 3.3107710953209E+17 | 5 | = 8.2769277383022E+17 |
| 2.5 | = 4.1384638691511E+17 | 5.5 | = 9.1046205121324E+17 |
| 3 | = 4.9661566429813E+17 | 6 | = 9.9323132859626E+17 |
| nails (cloth) | light-years |
|---|---|
| 1 | = 6.0408887912143 × 10-18 |
| 1.6553855476604 × 1017 | = 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 …) |