| 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 |
| ell | 944,228,214,173.23 ell | 1,888,456,428,346.5 ell | 2,832,684,642,519.7 ell | 3,776,912,856,692.9 ell | 4,721,141,070,866.1 ell | 5,665,369,285,039.4 ell | 6,609,597,499,212.6 ell | 7,553,825,713,385.8 ell | 8,498,053,927,559.1 ell | 9,442,282,141,732.3 ell | 10 386 510 355 906 ell | 11 330 738 570 079 ell | 12 274 966 784 252 ell | 13 219 194 998 425 ell | 14 163 423 212 598 ell | 15 107 651 426 772 ell | 16 051 879 640 945 ell | 16 996 107 855 118 ell | 17 940 336 069 291 ell | 18 884 564 283 465 ell | 19 828 792 497 638 ell | 20 773 020 711 811 ell | 21 717 248 925 984 ell | 22 661 477 140 157 ell | 23 605 705 354 331 ell | 24 549 933 568 504 ell | 25 494 161 782 677 ell | 26 438 389 996 850 ell | 27 382 618 211 024 ell | 28 326 846 425 197 ell | 29 271 074 639 370 ell | 30 215 302 853 543 ell | 31 159 531 067 717 ell | 32 103 759 281 890 ell | 33 047 987 496 063 ell | 33 992 215 710 236 ell | 34 936 443 924 409 ell | 35 880 672 138 583 ell | 36 824 900 352 756 ell | 37 769 128 566 929 ell | 38 713 356 781 102 ell | 39 657 584 995 276 ell | 40 601 813 209 449 ell | 41 546 041 423 622 ell | 42 490 269 637 795 ell | 43 434 497 851 968 ell | 44 378 726 066 142 ell | 45 322 954 280 315 ell | 46 267 182 494 488 ell | 47 211 410 708 661 ell | 48 155 638 922 835 ell | 49 099 867 137 008 ell | 50 044 095 351 181 ell | 50 988 323 565 354 ell | 51 932 551 779 528 ell | 52 876 779 993 701 ell | 53 821 008 207 874 ell | 54 765 236 422 047 ell | 55 709 464 636 220 ell | 56 653 692 850 394 ell | 57 597 921 064 567 ell | 58 542 149 278 740 ell | 59 486 377 492 913 ell | 60 430 605 707 087 ell | 61 374 833 921 260 ell | 62 319 062 135 433 ell | 63 263 290 349 606 ell | 64 207 518 563 780 ell | 65 151 746 777 953 ell | 66 095 974 992 126 ell | 67 040 203 206 299 ell | 67 984 431 420 472 ell | 68 928 659 634 646 ell | 69 872 887 848 819 ell | 70 817 116 062 992 ell | 71 761 344 277 165 ell | 72 705 572 491 339 ell | 73 649 800 705 512 ell | 74 594 028 919 685 ell | 75 538 257 133 858 ell | 76 482 485 348 032 ell | 77 426 713 562 205 ell | 78 370 941 776 378 ell | 79 315 169 990 551 ell | 80 259 398 204 724 ell | 81 203 626 418 898 ell | 82 147 854 633 071 ell | 83 092 082 847 244 ell | 84 036 311 061 417 ell | 84 980 539 275 591 ell | 85 924 767 489 764 ell | 86 868 995 703 937 ell | 87 813 223 918 110 ell | 88 757 452 132 283 ell | 89 701 680 346 457 ell | 90 645 908 560 630 ell | 91 590 136 774 803 ell | 92 534 364 988 976 ell | 93 478 593 203 150 ell | 94 422 821 417 323 ell |
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.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| light-hour | ≡ 60 light-minutes | ≡ 1.0792528488×1012 m | Science - Astronomy (Length) |
| light-hours | ell | light-hours | ell |
|---|---|---|---|
| 1 | = 944228214173.23 | 4 | = 3776912856692.9 |
| 1.5 | = 1416342321259.8 | 4.5 | = 4249026963779.5 |
| 2 | = 1888456428346.5 | 5 | = 4721141070866.1 |
| 2.5 | = 2360570535433.1 | 5.5 | = 5193255177952.8 |
| 3 | = 2832684642519.7 | 6 | = 5665369285039.4 |
An ell (from Proto-Germanic *alinō, cognate with Latin ulna) is a unit of measurement, originally a cubit, i.e., approximating the length of a man's arm from the elbow ("elbow" means the bend or bow of the ell or arm) to the tip of the middle finger, or about 18 inches (457 mm); in later usage, any of several longer units.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| ell | ell | ≡ 45 in (In England usually) | = 1.143 m | Other (Length) |
| ell | light-hours | ell | light-hours |
|---|---|---|---|
| 1 | = 1.0590660022541E-12 | 4 | = 4.2362640090165E-12 |
| 1.5 | = 1.5885990033812E-12 | 4.5 | = 4.7657970101436E-12 |
| 2 | = 2.1181320045083E-12 | 5 | = 5.2953300112707E-12 |
| 2.5 | = 2.6476650056353E-12 | 5.5 | = 5.8248630123977E-12 |
| 3 | = 3.1771980067624E-12 | 6 | = 6.3543960135248E-12 |
| light-hours | ell |
|---|---|
| 1 | = 944,228,214,173.23 |
| 1.0590660022541 × 10-12 | = 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 …) |