| light-day | 1 ly | 2 ly | 3 ly | 4 ly | 5 ly | 6 ly | 7 ly | 8 ly | 9 ly | 10 ly | 11 ly | 12 ly | 13 ly | 14 ly | 15 ly | 16 ly | 17 ly | 18 ly | 19 ly | 20 ly | 21 ly | 22 ly | 23 ly | 24 ly | 25 ly | 26 ly | 27 ly | 28 ly | 29 ly | 30 ly | 31 ly | 32 ly | 33 ly | 34 ly | 35 ly | 36 ly | 37 ly | 38 ly | 39 ly | 40 ly | 41 ly | 42 ly | 43 ly | 44 ly | 45 ly | 46 ly | 47 ly | 48 ly | 49 ly | 50 ly | 51 ly | 52 ly | 53 ly | 54 ly | 55 ly | 56 ly | 57 ly | 58 ly | 59 ly | 60 ly | 61 ly | 62 ly | 63 ly | 64 ly | 65 ly | 66 ly | 67 ly | 68 ly | 69 ly | 70 ly | 71 ly | 72 ly | 73 ly | 74 ly | 75 ly | 76 ly | 77 ly | 78 ly | 79 ly | 80 ly | 81 ly | 82 ly | 83 ly | 84 ly | 85 ly | 86 ly | 87 ly | 88 ly | 89 ly | 90 ly | 91 ly | 92 ly | 93 ly | 94 ly | 95 ly | 96 ly | 97 ly | 98 ly | 99 ly | 100 ly |
| chain | 1,287,581,368,206.9 ch | 2,575,162,736,413.9 ch | 3,862,744,104,620.8 ch | 5,150,325,472,827.7 ch | 6,437,906,841,034.7 ch | 7,725,488,209,241.6 ch | 9,013,069,577,448.5 ch | 10 300 650 945 655 ch | 11 588 232 313 862 ch | 12 875 813 682 069 ch | 14 163 395 050 276 ch | 15 450 976 418 483 ch | 16 738 557 786 690 ch | 18 026 139 154 897 ch | 19 313 720 523 104 ch | 20 601 301 891 311 ch | 21 888 883 259 518 ch | 23 176 464 627 725 ch | 24 464 045 995 932 ch | 25 751 627 364 139 ch | 27 039 208 732 346 ch | 28 326 790 100 553 ch | 29 614 371 468 760 ch | 30 901 952 836 966 ch | 32 189 534 205 173 ch | 33 477 115 573 380 ch | 34 764 696 941 587 ch | 36 052 278 309 794 ch | 37 339 859 678 001 ch | 38 627 441 046 208 ch | 39 915 022 414 415 ch | 41 202 603 782 622 ch | 42 490 185 150 829 ch | 43 777 766 519 036 ch | 45 065 347 887 243 ch | 46 352 929 255 450 ch | 47 640 510 623 657 ch | 48 928 091 991 864 ch | 50 215 673 360 070 ch | 51 503 254 728 277 ch | 52 790 836 096 484 ch | 54 078 417 464 691 ch | 55 365 998 832 898 ch | 56 653 580 201 105 ch | 57 941 161 569 312 ch | 59 228 742 937 519 ch | 60 516 324 305 726 ch | 61 803 905 673 933 ch | 63 091 487 042 140 ch | 64 379 068 410 347 ch | 65 666 649 778 554 ch | 66 954 231 146 761 ch | 68 241 812 514 968 ch | 69 529 393 883 174 ch | 70 816 975 251 381 ch | 72 104 556 619 588 ch | 73 392 137 987 795 ch | 74 679 719 356 002 ch | 75 967 300 724 209 ch | 77 254 882 092 416 ch | 78 542 463 460 623 ch | 79 830 044 828 830 ch | 81 117 626 197 037 ch | 82 405 207 565 244 ch | 83 692 788 933 451 ch | 84 980 370 301 658 ch | 86 267 951 669 865 ch | 87 555 533 038 072 ch | 88 843 114 406 279 ch | 90 130 695 774 485 ch | 91 418 277 142 692 ch | 92 705 858 510 899 ch | 93 993 439 879 106 ch | 95 281 021 247 313 ch | 96 568 602 615 520 ch | 97 856 183 983 727 ch | 99 143 765 351 934 ch | 1.0043134672014 × 1014 ch | 1.0171892808835 × 1014 ch | 1.0300650945655 × 1014 ch | 1.0429409082476 × 1014 ch | 1.0558167219297 × 1014 ch | 1.0686925356118 × 1014 ch | 1.0815683492938 × 1014 ch | 1.0944441629759 × 1014 ch | 1.107319976658 × 1014 ch | 1.12019579034 × 1014 ch | 1.1330716040221 × 1014 ch | 1.1459474177042 × 1014 ch | 1.1588232313862 × 1014 ch | 1.1716990450683 × 1014 ch | 1.1845748587504 × 1014 ch | 1.1974506724324 × 1014 ch | 1.2103264861145 × 1014 ch | 1.2232022997966 × 1014 ch | 1.2360781134787 × 1014 ch | 1.2489539271607 × 1014 ch | 1.2618297408428 × 1014 ch | 1.2747055545249 × 1014 ch | 1.2875813682069 × 1014 ch |
The light-day 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 oneday, and is equal to exactly 2.59020683712×1013 metres.
| 1 light-days ≈ 1287581368206.9 chains | 4 light-days ≈ 5150325472827.7 chains |
| 1.5 light-days ≈ 1931372052310.4 chains | 4.5 light-days ≈ 5794116156931.2 chains |
| 2 light-days ≈ 2575162736413.9 chains | 5 light-days ≈ 6437906841034.7 chains |
| 2.5 light-days ≈ 3218953420517.3 chains | 5.5 light-days ≈ 7081697525138.1 chains |
| 3 light-days ≈ 3862744104620.8 chains | 6 light-days ≈ 7725488209241.6 chains |
A chain is a unit of length. It measures 66 feet, or 22 yards, or 100 links, or 4 rods (20.1168 m). There are 10 chains in a furlong, and 80 chains in one statute mile. An acre is the area of 10 square chains (that is, an area of one chain by one furlong). The chain has been used for several centuries in Britain and in some other countries influenced by British practice.
| 1 chains ≈ 7.7664994593125E-13 light-days | 4 chains ≈ 3.106599783725E-12 light-days |
| 1.5 chains ≈ 1.1649749188969E-12 light-days | 4.5 chains ≈ 3.4949247566906E-12 light-days |
| 2 chains ≈ 1.5532998918625E-12 light-days | 5 chains ≈ 3.8832497296562E-12 light-days |
| 2.5 chains ≈ 1.9416248648281E-12 light-days | 5.5 chains ≈ 4.2715747026219E-12 light-days |
| 3 chains ≈ 2.3299498377937E-12 light-days | 6 chains ≈ 4.6598996755875E-12 light-days |
| 1 light-days ≈ 1,287,581,368,206.9 chains |
| 1 chains ≈ 7.7664994593125 × 10-13 light-days |