quarter | 1 qr. | 2 qr. | 3 qr. | 4 qr. | 5 qr. | 6 qr. | 7 qr. | 8 qr. | 9 qr. | 10 qr. | 11 qr. | 12 qr. | 13 qr. | 14 qr. | 15 qr. | 16 qr. | 17 qr. | 18 qr. | 19 qr. | 20 qr. | 21 qr. | 22 qr. | 23 qr. | 24 qr. | 25 qr. | 26 qr. | 27 qr. | 28 qr. | 29 qr. | 30 qr. | 31 qr. | 32 qr. | 33 qr. | 34 qr. | 35 qr. | 36 qr. | 37 qr. | 38 qr. | 39 qr. | 40 qr. | 41 qr. | 42 qr. | 43 qr. | 44 qr. | 45 qr. | 46 qr. | 47 qr. | 48 qr. | 49 qr. | 50 qr. | 51 qr. | 52 qr. | 53 qr. | 54 qr. | 55 qr. | 56 qr. | 57 qr. | 58 qr. | 59 qr. | 60 qr. | 61 qr. | 62 qr. | 63 qr. | 64 qr. | 65 qr. | 66 qr. | 67 qr. | 68 qr. | 69 qr. | 70 qr. | 71 qr. | 72 qr. | 73 qr. | 74 qr. | 75 qr. | 76 qr. | 77 qr. | 78 qr. | 79 qr. | 80 qr. | 81 qr. | 82 qr. | 83 qr. | 84 qr. | 85 qr. | 86 qr. | 87 qr. | 88 qr. | 89 qr. | 90 qr. | 91 qr. | 92 qr. | 93 qr. | 94 qr. | 95 qr. | 96 qr. | 97 qr. | 98 qr. | 99 qr. | 100 qr. |
micrometer | 228 600 μm | 457 200 μm | 685 800 μm | 914 400 μm | 1 143 000 μm | 1 371 600 μm | 1 600 200 μm | 1 828 800 μm | 2 057 400 μm | 2 286 000 μm | 2 514 600 μm | 2 743 200 μm | 2 971 800 μm | 3 200 400 μm | 3 429 000 μm | 3 657 600 μm | 3 886 200 μm | 4 114 800 μm | 4 343 400 μm | 4 572 000 μm | 4 800 600 μm | 5 029 200 μm | 5 257 800 μm | 5 486 400 μm | 5 715 000 μm | 5 943 600 μm | 6 172 200 μm | 6 400 800 μm | 6 629 400 μm | 6 858 000 μm | 7 086 600 μm | 7 315 200 μm | 7 543 800 μm | 7 772 400 μm | 8 001 000 μm | 8 229 600 μm | 8 458 200 μm | 8 686 800 μm | 8 915 400 μm | 9 144 000 μm | 9 372 600 μm | 9 601 200 μm | 9 829 800 μm | 10 058 400 μm | 10 287 000 μm | 10 515 600 μm | 10 744 200 μm | 10 972 800 μm | 11 201 400 μm | 11 430 000 μm | 11 658 600 μm | 11 887 200 μm | 12 115 800 μm | 12 344 400 μm | 12 573 000 μm | 12 801 600 μm | 13 030 200 μm | 13 258 800 μm | 13 487 400 μm | 13 716 000 μm | 13 944 600 μm | 14 173 200 μm | 14 401 800 μm | 14 630 400 μm | 14 859 000 μm | 15 087 600 μm | 15 316 200 μm | 15 544 800 μm | 15 773 400 μm | 16 002 000 μm | 16 230 600 μm | 16 459 200 μm | 16 687 800 μm | 16 916 400 μm | 17 145 000 μm | 17 373 600 μm | 17 602 200 μm | 17 830 800 μm | 18 059 400 μm | 18 288 000 μm | 18 516 600 μm | 18 745 200 μm | 18 973 800 μm | 19 202 400 μm | 19 431 000 μm | 19 659 600 μm | 19 888 200 μm | 20 116 800 μm | 20 345 400 μm | 20 574 000 μm | 20 802 600 μm | 21 031 200 μm | 21 259 800 μm | 21 488 400 μm | 21 717 000 μm | 21 945 600 μm | 22 174 200 μm | 22 402 800 μm | 22 631 400 μm | 22 860 000 μm |
The quarter (lit. "one-fourth") is used as the name of several distinct English units based on ¼ sizes of some base unit.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
quarter | qr. | ≡ 1⁄4 yd | = 0.2286 m | Metric system SI |
quarters | micrometers | quarters | micrometers |
---|---|---|---|
1 | = 228600 | 4 | = 914400 |
1.5 | = 342900 | 4.5 | = 1028700 |
2 | = 457200 | 5 | = 1143000 |
2.5 | = 571500 | 5.5 | = 1257300 |
3 | = 685800 | 6 | = 1371600 |
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).
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
micrometer | μm | ≡ 1×10-6 m | ≡ 1×10-6 m | Metric system SI |
micrometers | quarters | micrometers | quarters |
---|---|---|---|
1 | = 4.3744531933508E-6 | 4 | = 1.7497812773403E-5 |
1.5 | = 6.5616797900262E-6 | 4.5 | = 1.9685039370079E-5 |
2 | = 8.7489063867017E-6 | 5 | = 2.1872265966754E-5 |
2.5 | = 1.0936132983377E-5 | 5.5 | = 2.405949256343E-5 |
3 | = 1.3123359580052E-5 | 6 | = 2.6246719160105E-5 |
quarters | micrometers |
---|---|
1 | = 228 600 |
4.3744531933508 × 10-6 | = 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 …) |