| astronomical unit | 1 AU | 2 AU | 3 AU | 4 AU | 5 AU | 6 AU | 7 AU | 8 AU | 9 AU | 10 AU | 11 AU | 12 AU | 13 AU | 14 AU | 15 AU | 16 AU | 17 AU | 18 AU | 19 AU | 20 AU | 21 AU | 22 AU | 23 AU | 24 AU | 25 AU | 26 AU | 27 AU | 28 AU | 29 AU | 30 AU | 31 AU | 32 AU | 33 AU | 34 AU | 35 AU | 36 AU | 37 AU | 38 AU | 39 AU | 40 AU | 41 AU | 42 AU | 43 AU | 44 AU | 45 AU | 46 AU | 47 AU | 48 AU | 49 AU | 50 AU | 51 AU | 52 AU | 53 AU | 54 AU | 55 AU | 56 AU | 57 AU | 58 AU | 59 AU | 60 AU | 61 AU | 62 AU | 63 AU | 64 AU | 65 AU | 66 AU | 67 AU | 68 AU | 69 AU | 70 AU | 71 AU | 72 AU | 73 AU | 74 AU | 75 AU | 76 AU | 77 AU | 78 AU | 79 AU | 80 AU | 81 AU | 82 AU | 83 AU | 84 AU | 85 AU | 86 AU | 87 AU | 88 AU | 89 AU | 90 AU | 91 AU | 92 AU | 93 AU | 94 AU | 95 AU | 96 AU | 97 AU | 98 AU | 99 AU | 100 AU |
| foot | 490,806,662,401.57 ft | 981,613,324,803.15 ft | 1,472,419,987,204.7 ft | 1,963,226,649,606.3 ft | 2,454,033,312,007.9 ft | 2,944,839,974,409.4 ft | 3 435 646 636 811 ft | 3,926,453,299,212.6 ft | 4,417,259,961,614.2 ft | 4,908,066,624,015.7 ft | 5,398,873,286,417.3 ft | 5,889,679,948,818.9 ft | 6,380,486,611,220.5 ft | 6 871 293 273 622 ft | 7,362,099,936,023.6 ft | 7,852,906,598,425.2 ft | 8,343,713,260,826.8 ft | 8,834,519,923,228.3 ft | 9,325,326,585,629.9 ft | 9,816,133,248,031.5 ft | 10 306 939 910 433 ft | 10 797 746 572 835 ft | 11 288 553 235 236 ft | 11 779 359 897 638 ft | 12 270 166 560 039 ft | 12 760 973 222 441 ft | 13 251 779 884 843 ft | 13 742 586 547 244 ft | 14 233 393 209 646 ft | 14 724 199 872 047 ft | 15 215 006 534 449 ft | 15 705 813 196 850 ft | 16 196 619 859 252 ft | 16 687 426 521 654 ft | 17 178 233 184 055 ft | 17 669 039 846 457 ft | 18 159 846 508 858 ft | 18 650 653 171 260 ft | 19 141 459 833 661 ft | 19 632 266 496 063 ft | 20 123 073 158 465 ft | 20 613 879 820 866 ft | 21 104 686 483 268 ft | 21 595 493 145 669 ft | 22 086 299 808 071 ft | 22 577 106 470 472 ft | 23 067 913 132 874 ft | 23 558 719 795 276 ft | 24 049 526 457 677 ft | 24 540 333 120 079 ft | 25 031 139 782 480 ft | 25 521 946 444 882 ft | 26 012 753 107 283 ft | 26 503 559 769 685 ft | 26 994 366 432 087 ft | 27 485 173 094 488 ft | 27 975 979 756 890 ft | 28 466 786 419 291 ft | 28 957 593 081 693 ft | 29 448 399 744 094 ft | 29 939 206 406 496 ft | 30 430 013 068 898 ft | 30 920 819 731 299 ft | 31 411 626 393 701 ft | 31 902 433 056 102 ft | 32 393 239 718 504 ft | 32 884 046 380 906 ft | 33 374 853 043 307 ft | 33 865 659 705 709 ft | 34 356 466 368 110 ft | 34 847 273 030 512 ft | 35 338 079 692 913 ft | 35 828 886 355 315 ft | 36 319 693 017 717 ft | 36 810 499 680 118 ft | 37 301 306 342 520 ft | 37 792 113 004 921 ft | 38 282 919 667 323 ft | 38 773 726 329 724 ft | 39 264 532 992 126 ft | 39 755 339 654 528 ft | 40 246 146 316 929 ft | 40 736 952 979 331 ft | 41 227 759 641 732 ft | 41 718 566 304 134 ft | 42 209 372 966 535 ft | 42 700 179 628 937 ft | 43 190 986 291 339 ft | 43 681 792 953 740 ft | 44 172 599 616 142 ft | 44 663 406 278 543 ft | 45 154 212 940 945 ft | 45 645 019 603 346 ft | 46 135 826 265 748 ft | 46 626 632 928 150 ft | 47 117 439 590 551 ft | 47 608 246 252 953 ft | 48 099 052 915 354 ft | 48 589 859 577 756 ft | 49 080 666 240 157 ft |
The astronomical unit (symbol: au or ua) is a unit of length, roughly the distance from Earth to the Sun. However, that distance varies as Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, it is now defined as exactly 149 597 870 700 metres (about 150 million kilometres, or 93 million miles). The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System or around other stars. However, it is also a fundamental component in the definition of another unit of astronomical length, the parsec.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| astronomical unit | AU | ≡ 149 597 870 700 m ≈ Distance from Earth to Sun | ≡ 149 597 870 700 m | Science - Astronomy (Length) |
| astronomical units | feet | astronomical units | feet |
|---|---|---|---|
| 1 | ≡ 490806662401.57 | 4 | ≡ 1963226649606.3 |
| 1.5 | ≡ 736209993602.36 | 4.5 | ≡ 2208629980807.1 |
| 2 | ≡ 981613324803.15 | 5 | ≡ 2454033312007.9 |
| 2.5 | ≡ 1227016656003.9 | 5.5 | ≡ 2699436643208.7 |
| 3 | ≡ 1472419987204.7 | 6 | ≡ 2944839974409.4 |
The foot (pl. feet; abbreviation: ft; symbol: ′, the prime symbol) is a unit of length in the imperial and US customary systems of measurement. Since 1959, both units have been defined by international agreement as equivalent to 0.3048 meters exactly. In both systems, the foot comprises 12 inches and three feet compose a yard.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| foot | ft | ≡ 0.3048 m ≡ 1⁄3 yd ≡ 12 inches | ≡ 0.3048 m | Imperial/US |
| feet | astronomical units | feet | astronomical units |
|---|---|---|---|
| 1 | ≡ 2.0374621548674E-12 | 4 | ≡ 8.1498486194697E-12 |
| 1.5 | ≡ 3.0561932323011E-12 | 4.5 | ≡ 9.1685796969034E-12 |
| 2 | ≡ 4.0749243097348E-12 | 5 | ≡ 1.0187310774337E-11 |
| 2.5 | ≡ 5.0936553871686E-12 | 5.5 | ≡ 1.1206041851771E-11 |
| 3 | ≡ 6.1123864646023E-12 | 6 | ≡ 1.2224772929205E-11 |
| astronomical units | feet |
|---|---|
| 1 | ≡ 490,806,662,401.57 |
| 2.0374621548674 × 10-12 | ≡ 1 |
You can find the conversion in other languages in the following:
| 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 …) |