| fermtometer | 1 fm | 2 fm | 3 fm | 4 fm | 5 fm | 6 fm | 7 fm | 8 fm | 9 fm | 10 fm | 11 fm | 12 fm | 13 fm | 14 fm | 15 fm | 16 fm | 17 fm | 18 fm | 19 fm | 20 fm | 21 fm | 22 fm | 23 fm | 24 fm | 25 fm | 26 fm | 27 fm | 28 fm | 29 fm | 30 fm | 31 fm | 32 fm | 33 fm | 34 fm | 35 fm | 36 fm | 37 fm | 38 fm | 39 fm | 40 fm | 41 fm | 42 fm | 43 fm | 44 fm | 45 fm | 46 fm | 47 fm | 48 fm | 49 fm | 50 fm | 51 fm | 52 fm | 53 fm | 54 fm | 55 fm | 56 fm | 57 fm | 58 fm | 59 fm | 60 fm | 61 fm | 62 fm | 63 fm | 64 fm | 65 fm | 66 fm | 67 fm | 68 fm | 69 fm | 70 fm | 71 fm | 72 fm | 73 fm | 74 fm | 75 fm | 76 fm | 77 fm | 78 fm | 79 fm | 80 fm | 81 fm | 82 fm | 83 fm | 84 fm | 85 fm | 86 fm | 87 fm | 88 fm | 89 fm | 90 fm | 91 fm | 92 fm | 93 fm | 94 fm | 95 fm | 96 fm | 97 fm | 98 fm | 99 fm | 100 fm |
| light-year | 1.0570234105362 × 10-31 ly | 2.1140468210724 × 10-31 ly | 3.1710702316085 × 10-31 ly | 4.2280936421447 × 10-31 ly | 5.2851170526809 × 10-31 ly | 6.3421404632171 × 10-31 ly | 7.3991638737532 × 10-31 ly | 8.4561872842894 × 10-31 ly | 9.5132106948256 × 10-31 ly | 1.0570234105362 × 10-30 ly | 1.1627257515898 × 10-30 ly | 1.2684280926434 × 10-30 ly | 1.374130433697 × 10-30 ly | 1.4798327747506 × 10-30 ly | 1.5855351158043 × 10-30 ly | 1.6912374568579 × 10-30 ly | 1.7969397979115 × 10-30 ly | 1.9026421389651 × 10-30 ly | 2.0083444800187 × 10-30 ly | 2.1140468210724 × 10-30 ly | 2.219749162126 × 10-30 ly | 2.3254515031796 × 10-30 ly | 2.4311538442332 × 10-30 ly | 2.5368561852868 × 10-30 ly | 2.6425585263404 × 10-30 ly | 2.7482608673941 × 10-30 ly | 2.8539632084477 × 10-30 ly | 2.9596655495013 × 10-30 ly | 3.0653678905549 × 10-30 ly | 3.1710702316085 × 10-30 ly | 3.2767725726621 × 10-30 ly | 3.3824749137158 × 10-30 ly | 3.4881772547694 × 10-30 ly | 3.593879595823 × 10-30 ly | 3.6995819368766 × 10-30 ly | 3.8052842779302 × 10-30 ly | 3.9109866189839 × 10-30 ly | 4.0166889600375 × 10-30 ly | 4.1223913010911 × 10-30 ly | 4.2280936421447 × 10-30 ly | 4.3337959831983 × 10-30 ly | 4.4394983242519 × 10-30 ly | 4.5452006653056 × 10-30 ly | 4.6509030063592 × 10-30 ly | 4.7566053474128 × 10-30 ly | 4.8623076884664 × 10-30 ly | 4.96801002952 × 10-30 ly | 5.0737123705736 × 10-30 ly | 5.1794147116273 × 10-30 ly | 5.2851170526809 × 10-30 ly | 5.3908193937345 × 10-30 ly | 5.4965217347881 × 10-30 ly | 5.6022240758417 × 10-30 ly | 5.7079264168954 × 10-30 ly | 5.813628757949 × 10-30 ly | 5.9193310990026 × 10-30 ly | 6.0250334400562 × 10-30 ly | 6.1307357811098 × 10-30 ly | 6.2364381221634 × 10-30 ly | 6.3421404632171 × 10-30 ly | 6.4478428042707 × 10-30 ly | 6.5535451453243 × 10-30 ly | 6.6592474863779 × 10-30 ly | 6.7649498274315 × 10-30 ly | 6.8706521684851 × 10-30 ly | 6.9763545095388 × 10-30 ly | 7.0820568505924 × 10-30 ly | 7.187759191646 × 10-30 ly | 7.2934615326996 × 10-30 ly | 7.3991638737532 × 10-30 ly | 7.5048662148069 × 10-30 ly | 7.6105685558605 × 10-30 ly | 7.7162708969141 × 10-30 ly | 7.8219732379677 × 10-30 ly | 7.9276755790213 × 10-30 ly | 8.0333779200749 × 10-30 ly | 8.1390802611286 × 10-30 ly | 8.2447826021822 × 10-30 ly | 8.3504849432358 × 10-30 ly | 8.4561872842894 × 10-30 ly | 8.561889625343 × 10-30 ly | 8.6675919663966 × 10-30 ly | 8.7732943074503 × 10-30 ly | 8.8789966485039 × 10-30 ly | 8.9846989895575 × 10-30 ly | 9.0904013306111 × 10-30 ly | 9.1961036716647 × 10-30 ly | 9.3018060127184 × 10-30 ly | 9.407508353772 × 10-30 ly | 9.5132106948256 × 10-30 ly | 9.6189130358792 × 10-30 ly | 9.7246153769328 × 10-30 ly | 9.8303177179864 × 10-30 ly | 9.9360200590401 × 10-30 ly | 1.0041722400094 × 10-29 ly | 1.0147424741147 × 10-29 ly | 1.0253127082201 × 10-29 ly | 1.0358829423255 × 10-29 ly | 1.0464531764308 × 10-29 ly | 1.0570234105362 × 10-29 ly |
The femtometre (American spelling femtometer, symbol fm derived from the Danish and Norwegian word femten, "fifteen"+Ancient Greek: μέτρον, metrοn, "unit of measurement") is an SI unit of length equal to 10−15 metres, which means a quadrillionth of one. This distance can also be called a fermi and was so named in honour of physicist Enrico Fermi, as it is a typical length-scale of nuclear physics.
| 1 fermtometers = 1.0570234105362E-31 light-years | 4 fermtometers = 4.2280936421447E-31 light-years |
| 1.5 fermtometers = 1.5855351158043E-31 light-years | 4.5 fermtometers = 4.7566053474128E-31 light-years |
| 2 fermtometers = 2.1140468210724E-31 light-years | 5 fermtometers = 5.2851170526809E-31 light-years |
| 2.5 fermtometers = 2.6425585263404E-31 light-years | 5.5 fermtometers = 5.813628757949E-31 light-years |
| 3 fermtometers = 3.1710702316085E-31 light-years | 6 fermtometers = 6.3421404632171E-31 light-years |
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.
| 1 light-years = 9.4605284048794E+30 fermtometers | 4 light-years = 3.7842113619518E+31 fermtometers |
| 1.5 light-years = 1.4190792607319E+31 fermtometers | 4.5 light-years = 4.2572377821957E+31 fermtometers |
| 2 light-years = 1.8921056809759E+31 fermtometers | 5 light-years = 4.7302642024397E+31 fermtometers |
| 2.5 light-years = 2.3651321012198E+31 fermtometers | 5.5 light-years = 5.2032906226837E+31 fermtometers |
| 3 light-years = 2.8381585214638E+31 fermtometers | 6 light-years = 5.6763170429276E+31 fermtometers |
| 1 fermtometers = 1.0570234105362 × 10-31 light-years |
| 1 light-years = 9.4605284048794 × 1030 fermtometers |