| chain | 1 ch | 2 ch | 3 ch | 4 ch | 5 ch | 6 ch | 7 ch | 8 ch | 9 ch | 10 ch | 11 ch | 12 ch | 13 ch | 14 ch | 15 ch | 16 ch | 17 ch | 18 ch | 19 ch | 20 ch | 21 ch | 22 ch | 23 ch | 24 ch | 25 ch | 26 ch | 27 ch | 28 ch | 29 ch | 30 ch | 31 ch | 32 ch | 33 ch | 34 ch | 35 ch | 36 ch | 37 ch | 38 ch | 39 ch | 40 ch | 41 ch | 42 ch | 43 ch | 44 ch | 45 ch | 46 ch | 47 ch | 48 ch | 49 ch | 50 ch | 51 ch | 52 ch | 53 ch | 54 ch | 55 ch | 56 ch | 57 ch | 58 ch | 59 ch | 60 ch | 61 ch | 62 ch | 63 ch | 64 ch | 65 ch | 66 ch | 67 ch | 68 ch | 69 ch | 70 ch | 71 ch | 72 ch | 73 ch | 74 ch | 75 ch | 76 ch | 77 ch | 78 ch | 79 ch | 80 ch | 81 ch | 82 ch | 83 ch | 84 ch | 85 ch | 86 ch | 87 ch | 88 ch | 89 ch | 90 ch | 91 ch | 92 ch | 93 ch | 94 ch | 95 ch | 96 ch | 97 ch | 98 ch | 99 ch | 100 ch |
| micrometer | 20 116 840 μm | 40 233 680 μm | 60 350 520 μm | 80 467 360 μm | 100 584 200 μm | 120 701 040 μm | 140 817 880 μm | 160 934 720 μm | 181 051 560 μm | 201 168 400 μm | 221 285 240 μm | 241 402 080 μm | 261 518 920 μm | 281 635 760 μm | 301 752 600 μm | 321 869 440 μm | 341 986 280 μm | 362 103 120 μm | 382 219 960 μm | 402 336 800 μm | 422 453 640 μm | 442 570 480 μm | 462 687 320 μm | 482 804 160 μm | 502 921 000 μm | 523 037 840 μm | 543 154 680 μm | 563 271 520 μm | 583 388 360 μm | 603 505 200 μm | 623 622 040 μm | 643 738 880 μm | 663 855 720 μm | 683 972 560 μm | 704 089 400 μm | 724 206 240 μm | 744 323 080 μm | 764 439 920 μm | 784 556 760 μm | 804 673 600 μm | 824 790 440 μm | 844 907 280 μm | 865 024 120 μm | 885 140 960 μm | 905 257 800 μm | 925 374 640 μm | 945 491 480 μm | 965 608 320 μm | 985 725 160 μm | 1 005 842 000 μm | 1 025 958 840 μm | 1 046 075 680 μm | 1 066 192 520 μm | 1 086 309 360 μm | 1 106 426 200 μm | 1 126 543 040 μm | 1 146 659 880 μm | 1 166 776 720 μm | 1 186 893 560 μm | 1 207 010 400 μm | 1 227 127 240 μm | 1 247 244 080 μm | 1 267 360 920 μm | 1 287 477 760 μm | 1 307 594 600 μm | 1 327 711 440 μm | 1 347 828 280 μm | 1 367 945 120 μm | 1 388 061 960 μm | 1 408 178 800 μm | 1 428 295 640 μm | 1 448 412 480 μm | 1 468 529 320 μm | 1 488 646 160 μm | 1 508 763 000 μm | 1 528 879 840 μm | 1 548 996 680 μm | 1 569 113 520 μm | 1 589 230 360 μm | 1 609 347 200 μm | 1 629 464 040 μm | 1 649 580 880 μm | 1 669 697 720 μm | 1 689 814 560 μm | 1 709 931 400 μm | 1 730 048 240 μm | 1 750 165 080 μm | 1 770 281 920 μm | 1 790 398 760 μm | 1 810 515 600 μm | 1 830 632 440 μm | 1 850 749 280 μm | 1 870 866 120 μm | 1 890 982 960 μm | 1 911 099 800 μm | 1 931 216 640 μm | 1 951 333 480 μm | 1 971 450 320 μm | 1 991 567 160 μm | 2 011 684 000 μm |
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 ≈ 20116840 micrometers | 4 chains ≈ 80467360 micrometers |
| 1.5 chains ≈ 30175260 micrometers | 4.5 chains ≈ 90525780 micrometers |
| 2 chains ≈ 40233680 micrometers | 5 chains ≈ 100584200 micrometers |
| 2.5 chains ≈ 50292100 micrometers | 5.5 chains ≈ 110642620 micrometers |
| 3 chains ≈ 60350520 micrometers | 6 chains ≈ 120701040 micrometers |
The micrometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is an SI derived unit of length equaling 1×10−6 of a metre (SI standard prefix "micro-" = 10−6); that is, one millionth of a metre (or one thousandth of a millimetre, 0.001 mm, or about 0.000039 inch).
| 1 micrometers ≈ 4.9709596537031E-8 chains | 4 micrometers ≈ 1.9883838614812E-7 chains |
| 1.5 micrometers ≈ 7.4564394805546E-8 chains | 4.5 micrometers ≈ 2.2369318441664E-7 chains |
| 2 micrometers ≈ 9.9419193074061E-8 chains | 5 micrometers ≈ 2.4854798268515E-7 chains |
| 2.5 micrometers ≈ 1.2427399134258E-7 chains | 5.5 micrometers ≈ 2.7340278095367E-7 chains |
| 3 micrometers ≈ 1.4912878961109E-7 chains | 6 micrometers ≈ 2.9825757922218E-7 chains |
| 1 chains ≈ 20 116 840 micrometers |
| 1 micrometers ≈ 4.9709596537031 × 10-8 chains |