| light-hour | 1 light-hour | 2 light-hour | 3 light-hour | 4 light-hour | 5 light-hour | 6 light-hour | 7 light-hour | 8 light-hour | 9 light-hour | 10 light-hour | 11 light-hour | 12 light-hour | 13 light-hour | 14 light-hour | 15 light-hour | 16 light-hour | 17 light-hour | 18 light-hour | 19 light-hour | 20 light-hour | 21 light-hour | 22 light-hour | 23 light-hour | 24 light-hour | 25 light-hour | 26 light-hour | 27 light-hour | 28 light-hour | 29 light-hour | 30 light-hour | 31 light-hour | 32 light-hour | 33 light-hour | 34 light-hour | 35 light-hour | 36 light-hour | 37 light-hour | 38 light-hour | 39 light-hour | 40 light-hour | 41 light-hour | 42 light-hour | 43 light-hour | 44 light-hour | 45 light-hour | 46 light-hour | 47 light-hour | 48 light-hour | 49 light-hour | 50 light-hour | 51 light-hour | 52 light-hour | 53 light-hour | 54 light-hour | 55 light-hour | 56 light-hour | 57 light-hour | 58 light-hour | 59 light-hour | 60 light-hour | 61 light-hour | 62 light-hour | 63 light-hour | 64 light-hour | 65 light-hour | 66 light-hour | 67 light-hour | 68 light-hour | 69 light-hour | 70 light-hour | 71 light-hour | 72 light-hour | 73 light-hour | 74 light-hour | 75 light-hour | 76 light-hour | 77 light-hour | 78 light-hour | 79 light-hour | 80 light-hour | 81 light-hour | 82 light-hour | 83 light-hour | 84 light-hour | 85 light-hour | 86 light-hour | 87 light-hour | 88 light-hour | 89 light-hour | 90 light-hour | 91 light-hour | 92 light-hour | 93 light-hour | 94 light-hour | 95 light-hour | 96 light-hour | 97 light-hour | 98 light-hour | 99 light-hour | 100 light-hour |
| fermtometer | 1.0792528488 × 1027 fm | 2.1585056976 × 1027 fm | 3.2377585464 × 1027 fm | 4.3170113952 × 1027 fm | 5.396264244 × 1027 fm | 6.4755170928 × 1027 fm | 7.5547699416 × 1027 fm | 8.6340227904 × 1027 fm | 9.7132756392 × 1027 fm | 1.0792528488 × 1028 fm | 1.18717813368 × 1028 fm | 1.29510341856 × 1028 fm | 1.40302870344 × 1028 fm | 1.51095398832 × 1028 fm | 1.6188792732 × 1028 fm | 1.72680455808 × 1028 fm | 1.83472984296 × 1028 fm | 1.94265512784 × 1028 fm | 2.05058041272 × 1028 fm | 2.1585056976 × 1028 fm | 2.26643098248 × 1028 fm | 2.37435626736 × 1028 fm | 2.48228155224 × 1028 fm | 2.59020683712 × 1028 fm | 2.698132122 × 1028 fm | 2.80605740688 × 1028 fm | 2.91398269176 × 1028 fm | 3.02190797664 × 1028 fm | 3.12983326152 × 1028 fm | 3.2377585464 × 1028 fm | 3.34568383128 × 1028 fm | 3.45360911616 × 1028 fm | 3.56153440104 × 1028 fm | 3.66945968592 × 1028 fm | 3.7773849708 × 1028 fm | 3.88531025568 × 1028 fm | 3.99323554056 × 1028 fm | 4.10116082544 × 1028 fm | 4.20908611032 × 1028 fm | 4.3170113952 × 1028 fm | 4.42493668008 × 1028 fm | 4.53286196496 × 1028 fm | 4.64078724984 × 1028 fm | 4.74871253472 × 1028 fm | 4.8566378196 × 1028 fm | 4.96456310448 × 1028 fm | 5.07248838936 × 1028 fm | 5.18041367424 × 1028 fm | 5.28833895912 × 1028 fm | 5.396264244 × 1028 fm | 5.50418952888 × 1028 fm | 5.61211481376 × 1028 fm | 5.72004009864 × 1028 fm | 5.82796538352 × 1028 fm | 5.9358906684 × 1028 fm | 6.04381595328 × 1028 fm | 6.15174123816 × 1028 fm | 6.25966652304 × 1028 fm | 6.36759180792 × 1028 fm | 6.4755170928 × 1028 fm | 6.58344237768 × 1028 fm | 6.69136766256 × 1028 fm | 6.79929294744 × 1028 fm | 6.90721823232 × 1028 fm | 7.0151435172 × 1028 fm | 7.12306880208 × 1028 fm | 7.23099408696 × 1028 fm | 7.33891937184 × 1028 fm | 7.44684465672 × 1028 fm | 7.5547699416 × 1028 fm | 7.66269522648 × 1028 fm | 7.77062051136 × 1028 fm | 7.87854579624 × 1028 fm | 7.98647108112 × 1028 fm | 8.094396366 × 1028 fm | 8.20232165088 × 1028 fm | 8.31024693576 × 1028 fm | 8.41817222064 × 1028 fm | 8.52609750552 × 1028 fm | 8.6340227904 × 1028 fm | 8.74194807528 × 1028 fm | 8.84987336016 × 1028 fm | 8.95779864504 × 1028 fm | 9.06572392992 × 1028 fm | 9.1736492148 × 1028 fm | 9.28157449968 × 1028 fm | 9.38949978456 × 1028 fm | 9.49742506944 × 1028 fm | 9.60535035432 × 1028 fm | 9.7132756392 × 1028 fm | 9.82120092408 × 1028 fm | 9.92912620896 × 1028 fm | 1.003705149384 × 1029 fm | 1.014497677872 × 1029 fm | 1.02529020636 × 1029 fm | 1.036082734848 × 1029 fm | 1.046875263336 × 1029 fm | 1.057667791824 × 1029 fm | 1.068460320312 × 1029 fm | 1.0792528488 × 1029 fm |
The light-hour 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 onehour, and is equal to exactly 1.0792528488×1012 metres.
| 1 light-hours ≡ 1.0792528488E+27 fermtometers | 4 light-hours ≡ 4.3170113952E+27 fermtometers |
| 1.5 light-hours ≡ 1.6188792732E+27 fermtometers | 4.5 light-hours ≡ 4.8566378196E+27 fermtometers |
| 2 light-hours ≡ 2.1585056976E+27 fermtometers | 5 light-hours ≡ 5.396264244E+27 fermtometers |
| 2.5 light-hours ≡ 2.698132122E+27 fermtometers | 5.5 light-hours ≡ 5.9358906684E+27 fermtometers |
| 3 light-hours ≡ 3.2377585464E+27 fermtometers | 6 light-hours ≡ 6.4755170928E+27 fermtometers |
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 ≡ 9.2656693110598E-28 light-hours | 4 fermtometers ≡ 3.7062677244239E-27 light-hours |
| 1.5 fermtometers ≡ 1.389850396659E-27 light-hours | 4.5 fermtometers ≡ 4.1695511899769E-27 light-hours |
| 2 fermtometers ≡ 1.853133862212E-27 light-hours | 5 fermtometers ≡ 4.6328346555299E-27 light-hours |
| 2.5 fermtometers ≡ 2.3164173277649E-27 light-hours | 5.5 fermtometers ≡ 5.0961181210829E-27 light-hours |
| 3 fermtometers ≡ 2.7797007933179E-27 light-hours | 6 fermtometers ≡ 5.5594015866359E-27 light-hours |
| 1 light-hours ≡ 1.0792528488 × 1027 fermtometers |
| 1 fermtometers ≡ 9.2656693110598 × 10-28 light-hours |