| angular mil | 1 µ | 2 µ | 3 µ | 4 µ | 5 µ | 6 µ | 7 µ | 8 µ | 9 µ | 10 µ | 11 µ | 12 µ | 13 µ | 14 µ | 15 µ | 16 µ | 17 µ | 18 µ | 19 µ | 20 µ | 21 µ | 22 µ | 23 µ | 24 µ | 25 µ | 26 µ | 27 µ | 28 µ | 29 µ | 30 µ | 31 µ | 32 µ | 33 µ | 34 µ | 35 µ | 36 µ | 37 µ | 38 µ | 39 µ | 40 µ | 41 µ | 42 µ | 43 µ | 44 µ | 45 µ | 46 µ | 47 µ | 48 µ | 49 µ | 50 µ | 51 µ | 52 µ | 53 µ | 54 µ | 55 µ | 56 µ | 57 µ | 58 µ | 59 µ | 60 µ | 61 µ | 62 µ | 63 µ | 64 µ | 65 µ | 66 µ | 67 µ | 68 µ | 69 µ | 70 µ | 71 µ | 72 µ | 73 µ | 74 µ | 75 µ | 76 µ | 77 µ | 78 µ | 79 µ | 80 µ | 81 µ | 82 µ | 83 µ | 84 µ | 85 µ | 86 µ | 87 µ | 88 µ | 89 µ | 90 µ | 91 µ | 92 µ | 93 µ | 94 µ | 95 µ | 96 µ | 97 µ | 98 µ | 99 µ | 100 µ |
| arcsecond | 3.1808625 " | 6.3617250 " | 9.5425875 " | 12.7234500 " | 15.9043125 " | 19.0851750 " | 22.2660376 " | 25.4469001 " | 28.6277626 " | 31.8086251 " | 34.9894876 " | 38.1703501 " | 41.3512126 " | 44.5320751 " | 47.7129376 " | 50.8938001 " | 54.0746626 " | 57.2555251 " | 60.4363876 " | 63.6172502 " | 66.7981127 " | 69.9789752 " | 73.1598377 " | 76.3407002 " | 79.5215627 " | 82.7024252 " | 85.8832877 " | 89.0641502 " | 92.2450127 " | 95.4258752 " | 98.6067377 " | 101.7876002 " | 104.9684627 " | 108.1493253 " | 111.3301878 " | 114.5110503 " | 117.6919128 " | 120.8727753 " | 124.0536378 " | 127.2345003 " | 130.4153628 " | 133.5962253 " | 136.7770878 " | 139.9579503 " | 143.1388128 " | 146.3196753 " | 149.5005379 " | 152.6814004 " | 155.8622629 " | 159.0431254 " | 162.2239879 " | 165.4048504 " | 168.5857129 " | 171.7665754 " | 174.9474379 " | 178.1283004 " | 181.3091629 " | 184.4900254 " | 187.6708879 " | 190.8517505 " | 194.0326130 " | 197.2134755 " | 200.3943380 " | 203.5752005 " | 206.7560630 " | 209.9369255 " | 213.1177880 " | 216.2986505 " | 219.4795130 " | 222.6603755 " | 225.8412380 " | 229.0221005 " | 232.2029630 " | 235.3838256 " | 238.5646881 " | 241.7455506 " | 244.9264131 " | 248.1072756 " | 251.2881381 " | 254.4690006 " | 257.6498631 " | 260.8307256 " | 264.0115881 " | 267.1924506 " | 270.3733131 " | 273.5541756 " | 276.7350382 " | 279.9159007 " | 283.0967632 " | 286.2776257 " | 289.4584882 " | 292.6393507 " | 295.8202132 " | 299.0010757 " | 302.1819382 " | 305.3628007 " | 308.5436632 " | 311.7245257 " | 314.9053882 " | 318.0862508 " |
A angular mil is the unit of angular measurement equal to 1/6400 of a complete circle. At 1000 metres one mil subtends about one metre (~0,98 m). Also 1/6000 and 1/6300 are used in other countries.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| angular mil | µ | ≡ 2π⁄6400 rad | ≈ 0.981748×10−3 rad | Metric system SI |
| angular mils | arcseconds | angular mils | arcseconds |
|---|---|---|---|
| 1 | ≈ 3.1808625075 | 6 | ≈ 19.085175045 |
| 2 | ≈ 6.361725015 | 7 | ≈ 22.2660375525 |
| 3 | ≈ 9.5425875225 | 8 | ≈ 25.44690006 |
| 4 | ≈ 12.72345003 | 9 | ≈ 28.6277625675 |
| 5 | ≈ 15.9043125375 | 10 | ≈ 31.808625075 |
A second of arc, arcsecond (arcsec), arc second, or second arc is a unit of angular measurement equal to 1/3600 of one degree.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| arcsecond | " | ≡ 1°⁄3600 | ≈ 4.848137×10−6 rad | Metric system SI |
| arcseconds | angular mils | arcseconds | angular mils |
|---|---|---|---|
| 1 | ≈ 0.31438013986526 | 6 | ≈ 1.8862808391915 |
| 2 | ≈ 0.62876027973051 | 7 | ≈ 2.2006609790568 |
| 3 | ≈ 0.94314041959577 | 8 | ≈ 2.5150411189221 |
| 4 | ≈ 1.257520559461 | 9 | ≈ 2.8294212587873 |
| 5 | ≈ 1.5719006993263 | 10 | ≈ 3.1438013986526 |
| angular mils | arcseconds |
|---|---|
| 1 | ≈ 3.1808625 |
| 0.3143801 | ≈ 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 …) |