| fermi | 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-second | 3.3356409519815 × 10-24 light-second | 6.671281903963 × 10-24 light-second | 1.0006922855945 × 10-23 light-second | 1.3342563807926 × 10-23 light-second | 1.6678204759908 × 10-23 light-second | 2.0013845711889 × 10-23 light-second | 2.3349486663871 × 10-23 light-second | 2.6685127615852 × 10-23 light-second | 3.0020768567834 × 10-23 light-second | 3.3356409519815 × 10-23 light-second | 3.6692050471797 × 10-23 light-second | 4.0027691423778 × 10-23 light-second | 4.336333237576 × 10-23 light-second | 4.6698973327741 × 10-23 light-second | 5.0034614279723 × 10-23 light-second | 5.3370255231704 × 10-23 light-second | 5.6705896183686 × 10-23 light-second | 6.0041537135667 × 10-23 light-second | 6.3377178087649 × 10-23 light-second | 6.671281903963 × 10-23 light-second | 7.0048459991612 × 10-23 light-second | 7.3384100943593 × 10-23 light-second | 7.6719741895575 × 10-23 light-second | 8.0055382847556 × 10-23 light-second | 8.3391023799538 × 10-23 light-second | 8.672666475152 × 10-23 light-second | 9.0062305703501 × 10-23 light-second | 9.3397946655483 × 10-23 light-second | 9.6733587607464 × 10-23 light-second | 1.0006922855945 × 10-22 light-second | 1.0340486951143 × 10-22 light-second | 1.0674051046341 × 10-22 light-second | 1.1007615141539 × 10-22 light-second | 1.1341179236737 × 10-22 light-second | 1.1674743331935 × 10-22 light-second | 1.2008307427133 × 10-22 light-second | 1.2341871522332 × 10-22 light-second | 1.267543561753 × 10-22 light-second | 1.3008999712728 × 10-22 light-second | 1.3342563807926 × 10-22 light-second | 1.3676127903124 × 10-22 light-second | 1.4009691998322 × 10-22 light-second | 1.4343256093521 × 10-22 light-second | 1.4676820188719 × 10-22 light-second | 1.5010384283917 × 10-22 light-second | 1.5343948379115 × 10-22 light-second | 1.5677512474313 × 10-22 light-second | 1.6011076569511 × 10-22 light-second | 1.6344640664709 × 10-22 light-second | 1.6678204759908 × 10-22 light-second | 1.7011768855106 × 10-22 light-second | 1.7345332950304 × 10-22 light-second | 1.7678897045502 × 10-22 light-second | 1.80124611407 × 10-22 light-second | 1.8346025235898 × 10-22 light-second | 1.8679589331097 × 10-22 light-second | 1.9013153426295 × 10-22 light-second | 1.9346717521493 × 10-22 light-second | 1.9680281616691 × 10-22 light-second | 2.0013845711889 × 10-22 light-second | 2.0347409807087 × 10-22 light-second | 2.0680973902285 × 10-22 light-second | 2.1014537997484 × 10-22 light-second | 2.1348102092682 × 10-22 light-second | 2.168166618788 × 10-22 light-second | 2.2015230283078 × 10-22 light-second | 2.2348794378276 × 10-22 light-second | 2.2682358473474 × 10-22 light-second | 2.3015922568672 × 10-22 light-second | 2.3349486663871 × 10-22 light-second | 2.3683050759069 × 10-22 light-second | 2.4016614854267 × 10-22 light-second | 2.4350178949465 × 10-22 light-second | 2.4683743044663 × 10-22 light-second | 2.5017307139861 × 10-22 light-second | 2.535087123506 × 10-22 light-second | 2.5684435330258 × 10-22 light-second | 2.6017999425456 × 10-22 light-second | 2.6351563520654 × 10-22 light-second | 2.6685127615852 × 10-22 light-second | 2.701869171105 × 10-22 light-second | 2.7352255806248 × 10-22 light-second | 2.7685819901447 × 10-22 light-second | 2.8019383996645 × 10-22 light-second | 2.8352948091843 × 10-22 light-second | 2.8686512187041 × 10-22 light-second | 2.9020076282239 × 10-22 light-second | 2.9353640377437 × 10-22 light-second | 2.9687204472636 × 10-22 light-second | 3.0020768567834 × 10-22 light-second | 3.0354332663032 × 10-22 light-second | 3.068789675823 × 10-22 light-second | 3.1021460853428 × 10-22 light-second | 3.1355024948626 × 10-22 light-second | 3.1688589043824 × 10-22 light-second | 3.2022153139023 × 10-22 light-second | 3.2355717234221 × 10-22 light-second | 3.2689281329419 × 10-22 light-second | 3.3022845424617 × 10-22 light-second | 3.3356409519815 × 10-22 light-second |
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 fermi ≡ 3.3356409519815E-24 light-seconds | 4 fermi ≡ 1.3342563807926E-23 light-seconds |
| 1.5 fermi ≡ 5.0034614279723E-24 light-seconds | 4.5 fermi ≡ 1.5010384283917E-23 light-seconds |
| 2 fermi ≡ 6.671281903963E-24 light-seconds | 5 fermi ≡ 1.6678204759908E-23 light-seconds |
| 2.5 fermi ≡ 8.3391023799538E-24 light-seconds | 5.5 fermi ≡ 1.8346025235898E-23 light-seconds |
| 3 fermi ≡ 1.0006922855945E-23 light-seconds | 6 fermi ≡ 2.0013845711889E-23 light-seconds |
The light-second is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in onesecond, and is equal to exactly 299792458 metres (just over 186282 miles).
| 1 light-seconds ≡ 2.99792458E+23 fermi | 4 light-seconds ≡ 1.199169832E+24 fermi |
| 1.5 light-seconds ≡ 4.49688687E+23 fermi | 4.5 light-seconds ≡ 1.349066061E+24 fermi |
| 2 light-seconds ≡ 5.99584916E+23 fermi | 5 light-seconds ≡ 1.49896229E+24 fermi |
| 2.5 light-seconds ≡ 7.49481145E+23 fermi | 5.5 light-seconds ≡ 1.648858519E+24 fermi |
| 3 light-seconds ≡ 8.99377374E+23 fermi | 6 light-seconds ≡ 1.798754748E+24 fermi |
| 1 fermi ≡ 3.3356409519815 × 10-24 light-seconds |
| 1 light-seconds ≡ 2.99792458 × 1023 fermi |