fermtometer | 1 fm | 2 fm | 3 fm | 4 fm | 5 fm | 6 fm | 7 fm | 8 fm | 9 fm | 10 fm | 11 fm | 12 fm | 13 fm | 14 fm | 15 fm | 16 fm | 17 fm | 18 fm | 19 fm | 20 fm | 21 fm | 22 fm | 23 fm | 24 fm | 25 fm | 26 fm | 27 fm | 28 fm | 29 fm | 30 fm | 31 fm | 32 fm | 33 fm | 34 fm | 35 fm | 36 fm | 37 fm | 38 fm | 39 fm | 40 fm | 41 fm | 42 fm | 43 fm | 44 fm | 45 fm | 46 fm | 47 fm | 48 fm | 49 fm | 50 fm | 51 fm | 52 fm | 53 fm | 54 fm | 55 fm | 56 fm | 57 fm | 58 fm | 59 fm | 60 fm | 61 fm | 62 fm | 63 fm | 64 fm | 65 fm | 66 fm | 67 fm | 68 fm | 69 fm | 70 fm | 71 fm | 72 fm | 73 fm | 74 fm | 75 fm | 76 fm | 77 fm | 78 fm | 79 fm | 80 fm | 81 fm | 82 fm | 83 fm | 84 fm | 85 fm | 86 fm | 87 fm | 88 fm | 89 fm | 90 fm | 91 fm | 92 fm | 93 fm | 94 fm | 95 fm | 96 fm | 97 fm | 98 fm | 99 fm | 100 fm |
point (Didot; European) | 2.65999999734 × 10-12 pt | 5.31999999468 × 10-12 pt | 7.97999999202 × 10-12 pt | 1.063999998936 × 10-11 pt | 1.32999999867 × 10-11 pt | 1.595999998404 × 10-11 pt | 1.861999998138 × 10-11 pt | 2.127999997872 × 10-11 pt | 2.393999997606 × 10-11 pt | 2.65999999734 × 10-11 pt | 2.925999997074 × 10-11 pt | 3.191999996808 × 10-11 pt | 3.457999996542 × 10-11 pt | 3.723999996276 × 10-11 pt | 3.98999999601 × 10-11 pt | 4.255999995744 × 10-11 pt | 4.521999995478 × 10-11 pt | 4.787999995212 × 10-11 pt | 5.053999994946 × 10-11 pt | 5.31999999468 × 10-11 pt | 5.585999994414 × 10-11 pt | 5.851999994148 × 10-11 pt | 6.117999993882 × 10-11 pt | 6.383999993616 × 10-11 pt | 6.64999999335 × 10-11 pt | 6.915999993084 × 10-11 pt | 7.181999992818 × 10-11 pt | 7.447999992552 × 10-11 pt | 7.713999992286 × 10-11 pt | 7.97999999202 × 10-11 pt | 8.245999991754 × 10-11 pt | 8.511999991488 × 10-11 pt | 8.777999991222 × 10-11 pt | 9.043999990956 × 10-11 pt | 9.30999999069 × 10-11 pt | 9.575999990424 × 10-11 pt | 9.841999990158 × 10-11 pt | 1.0107999989892 × 10-10 pt | 1.0373999989626 × 10-10 pt | 1.063999998936 × 10-10 pt | 1.0905999989094 × 10-10 pt | 1.1171999988828 × 10-10 pt | 1.1437999988562 × 10-10 pt | 1.1703999988296 × 10-10 pt | 1.196999998803 × 10-10 pt | 1.2235999987764 × 10-10 pt | 1.2501999987498 × 10-10 pt | 1.2767999987232 × 10-10 pt | 1.3033999986966 × 10-10 pt | 1.32999999867 × 10-10 pt | 1.3565999986434 × 10-10 pt | 1.3831999986168 × 10-10 pt | 1.4097999985902 × 10-10 pt | 1.4363999985636 × 10-10 pt | 1.462999998537 × 10-10 pt | 1.4895999985104 × 10-10 pt | 1.5161999984838 × 10-10 pt | 1.5427999984572 × 10-10 pt | 1.5693999984306 × 10-10 pt | 1.595999998404 × 10-10 pt | 1.6225999983774 × 10-10 pt | 1.6491999983508 × 10-10 pt | 1.6757999983242 × 10-10 pt | 1.7023999982976 × 10-10 pt | 1.728999998271 × 10-10 pt | 1.7555999982444 × 10-10 pt | 1.7821999982178 × 10-10 pt | 1.8087999981912 × 10-10 pt | 1.8353999981646 × 10-10 pt | 1.861999998138 × 10-10 pt | 1.8885999981114 × 10-10 pt | 1.9151999980848 × 10-10 pt | 1.9417999980582 × 10-10 pt | 1.9683999980316 × 10-10 pt | 1.994999998005 × 10-10 pt | 2.0215999979784 × 10-10 pt | 2.0481999979518 × 10-10 pt | 2.0747999979252 × 10-10 pt | 2.1013999978986 × 10-10 pt | 2.127999997872 × 10-10 pt | 2.1545999978454 × 10-10 pt | 2.1811999978188 × 10-10 pt | 2.2077999977922 × 10-10 pt | 2.2343999977656 × 10-10 pt | 2.260999997739 × 10-10 pt | 2.2875999977124 × 10-10 pt | 2.3141999976858 × 10-10 pt | 2.3407999976592 × 10-10 pt | 2.3673999976326 × 10-10 pt | 2.393999997606 × 10-10 pt | 2.4205999975794 × 10-10 pt | 2.4471999975528 × 10-10 pt | 2.4737999975262 × 10-10 pt | 2.5003999974996 × 10-10 pt | 2.526999997473 × 10-10 pt | 2.5535999974464 × 10-10 pt | 2.5801999974198 × 10-10 pt | 2.6067999973932 × 10-10 pt | 2.6333999973666 × 10-10 pt | 2.65999999734 × 10-10 pt |
The femtometre (American spelling femtometer, symbol fm derived from the Danish and Norwegian word femten, "fifteen"+Ancient Greek: μέτρον, metrοn, "unit of measurement") is an SI unit of length equal to 10−15 metres, which means a quadrillionth of one. This distance can also be called a fermi and was so named in honour of physicist Enrico Fermi, as it is a typical length-scale of nuclear physics.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
fermtometer | fm | 1000 attometres = 1 femtometre = 1 fermi = 0.001 picometre = 1×10−15 metres 1000000 femtometres = 10 ångström = 1 nanometre. | ≡ 1×10-15 m | Metric system SI |
fermtometers | points (Didot; European) | fermtometers | points (Didot; European) |
---|---|---|---|
1 | ≈ 2.65999999734E-12 | 4 | ≈ 1.063999998936E-11 |
1.5 | ≈ 3.98999999601E-12 | 4.5 | ≈ 1.196999998803E-11 |
2 | ≈ 5.31999999468E-12 | 5 | ≈ 1.32999999867E-11 |
2.5 | ≈ 6.64999999335E-12 | 5.5 | ≈ 1.462999998537E-11 |
3 | ≈ 7.97999999202E-12 | 6 | ≈ 1.595999998404E-11 |
In typography, the point is the smallest unit of measure. It is used for measuring font size, leading, and other items on a printed page.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
point (Didot; European) | pt | ≡ 1⁄12 × 1⁄72 of pied du roi; | ≈ 0.00037597 m; | Other (Length) |
points (Didot; European) | fermtometers | points (Didot; European) | fermtometers |
---|---|---|---|
1 | ≈ 375939850000 | 4 | ≈ 1503759400000 |
1.5 | ≈ 563909775000 | 4.5 | ≈ 1691729325000 |
2 | ≈ 751879700000 | 5 | ≈ 1879699250000 |
2.5 | ≈ 939849625000 | 5.5 | ≈ 2067669175000 |
3 | ≈ 1127819550000 | 6 | ≈ 2255639100000 |
fermtometers | points (Didot; European) |
---|---|
1 | ≈ 2.65999999734 × 10-12 |
375 939 850 000 | ≈ 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 …) |