| 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 |
| finger (cloth) | 8.7489063867017 × 10-15 finger (cloth) | 1.7497812773403 × 10-14 finger (cloth) | 2.6246719160105 × 10-14 finger (cloth) | 3.4995625546807 × 10-14 finger (cloth) | 4.3744531933508 × 10-14 finger (cloth) | 5.249343832021 × 10-14 finger (cloth) | 6.1242344706912 × 10-14 finger (cloth) | 6.9991251093613 × 10-14 finger (cloth) | 7.8740157480315 × 10-14 finger (cloth) | 8.7489063867017 × 10-14 finger (cloth) | 9.6237970253718 × 10-14 finger (cloth) | 1.0498687664042 × 10-13 finger (cloth) | 1.1373578302712 × 10-13 finger (cloth) | 1.2248468941382 × 10-13 finger (cloth) | 1.3123359580052 × 10-13 finger (cloth) | 1.3998250218723 × 10-13 finger (cloth) | 1.4873140857393 × 10-13 finger (cloth) | 1.5748031496063 × 10-13 finger (cloth) | 1.6622922134733 × 10-13 finger (cloth) | 1.7497812773403 × 10-13 finger (cloth) | 1.8372703412073 × 10-13 finger (cloth) | 1.9247594050744 × 10-13 finger (cloth) | 2.0122484689414 × 10-13 finger (cloth) | 2.0997375328084 × 10-13 finger (cloth) | 2.1872265966754 × 10-13 finger (cloth) | 2.2747156605424 × 10-13 finger (cloth) | 2.3622047244094 × 10-13 finger (cloth) | 2.4496937882765 × 10-13 finger (cloth) | 2.5371828521435 × 10-13 finger (cloth) | 2.6246719160105 × 10-13 finger (cloth) | 2.7121609798775 × 10-13 finger (cloth) | 2.7996500437445 × 10-13 finger (cloth) | 2.8871391076115 × 10-13 finger (cloth) | 2.9746281714786 × 10-13 finger (cloth) | 3.0621172353456 × 10-13 finger (cloth) | 3.1496062992126 × 10-13 finger (cloth) | 3.2370953630796 × 10-13 finger (cloth) | 3.3245844269466 × 10-13 finger (cloth) | 3.4120734908136 × 10-13 finger (cloth) | 3.4995625546807 × 10-13 finger (cloth) | 3.5870516185477 × 10-13 finger (cloth) | 3.6745406824147 × 10-13 finger (cloth) | 3.7620297462817 × 10-13 finger (cloth) | 3.8495188101487 × 10-13 finger (cloth) | 3.9370078740157 × 10-13 finger (cloth) | 4.0244969378828 × 10-13 finger (cloth) | 4.1119860017498 × 10-13 finger (cloth) | 4.1994750656168 × 10-13 finger (cloth) | 4.2869641294838 × 10-13 finger (cloth) | 4.3744531933508 × 10-13 finger (cloth) | 4.4619422572178 × 10-13 finger (cloth) | 4.5494313210849 × 10-13 finger (cloth) | 4.6369203849519 × 10-13 finger (cloth) | 4.7244094488189 × 10-13 finger (cloth) | 4.8118985126859 × 10-13 finger (cloth) | 4.8993875765529 × 10-13 finger (cloth) | 4.9868766404199 × 10-13 finger (cloth) | 5.074365704287 × 10-13 finger (cloth) | 5.161854768154 × 10-13 finger (cloth) | 5.249343832021 × 10-13 finger (cloth) | 5.336832895888 × 10-13 finger (cloth) | 5.424321959755 × 10-13 finger (cloth) | 5.511811023622 × 10-13 finger (cloth) | 5.5993000874891 × 10-13 finger (cloth) | 5.6867891513561 × 10-13 finger (cloth) | 5.7742782152231 × 10-13 finger (cloth) | 5.8617672790901 × 10-13 finger (cloth) | 5.9492563429571 × 10-13 finger (cloth) | 6.0367454068241 × 10-13 finger (cloth) | 6.1242344706912 × 10-13 finger (cloth) | 6.2117235345582 × 10-13 finger (cloth) | 6.2992125984252 × 10-13 finger (cloth) | 6.3867016622922 × 10-13 finger (cloth) | 6.4741907261592 × 10-13 finger (cloth) | 6.5616797900262 × 10-13 finger (cloth) | 6.6491688538933 × 10-13 finger (cloth) | 6.7366579177603 × 10-13 finger (cloth) | 6.8241469816273 × 10-13 finger (cloth) | 6.9116360454943 × 10-13 finger (cloth) | 6.9991251093613 × 10-13 finger (cloth) | 7.0866141732283 × 10-13 finger (cloth) | 7.1741032370954 × 10-13 finger (cloth) | 7.2615923009624 × 10-13 finger (cloth) | 7.3490813648294 × 10-13 finger (cloth) | 7.4365704286964 × 10-13 finger (cloth) | 7.5240594925634 × 10-13 finger (cloth) | 7.6115485564304 × 10-13 finger (cloth) | 7.6990376202975 × 10-13 finger (cloth) | 7.7865266841645 × 10-13 finger (cloth) | 7.8740157480315 × 10-13 finger (cloth) | 7.9615048118985 × 10-13 finger (cloth) | 8.0489938757655 × 10-13 finger (cloth) | 8.1364829396325 × 10-13 finger (cloth) | 8.2239720034996 × 10-13 finger (cloth) | 8.3114610673666 × 10-13 finger (cloth) | 8.3989501312336 × 10-13 finger (cloth) | 8.4864391951006 × 10-13 finger (cloth) | 8.5739282589676 × 10-13 finger (cloth) | 8.6614173228346 × 10-13 finger (cloth) | 8.7489063867017 × 10-13 finger (cloth) |
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 | finger (cloth) | fermtometers | finger (cloth) |
|---|---|---|---|
| 1 | = 8.7489063867017E-15 | 4 | = 3.4995625546807E-14 |
| 1.5 | = 1.3123359580052E-14 | 4.5 | = 3.9370078740157E-14 |
| 2 | = 1.7497812773403E-14 | 5 | = 4.3744531933508E-14 |
| 2.5 | = 2.1872265966754E-14 | 5.5 | = 4.8118985126859E-14 |
| 3 | = 2.6246719160105E-14 | 6 | = 5.249343832021E-14 |
A finger (sometimes fingerbreadth or finger's breadth) is any of several units of measurement that are approximately the width of an adult human finger, including:
The digit, also known as digitus or digitus transversus (Latin), dactyl (Greek) or dactylus, or finger's breadth — 3⁄4 of an inch or 1⁄16 of a foot
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| finger (cloth) | ≡ 4 ⁄12 in | = 0.1143 m | Other (Length) |
| finger (cloth) | fermtometers | finger (cloth) | fermtometers |
|---|---|---|---|
| 1 | = 1.143E+14 | 4 | = 4.572E+14 |
| 1.5 | = 1.7145E+14 | 4.5 | = 5.1435E+14 |
| 2 | = 2.286E+14 | 5 | = 5.715E+14 |
| 2.5 | = 2.8575E+14 | 5.5 | = 6.2865E+14 |
| 3 | = 3.429E+14 | 6 | = 6.858E+14 |
| fermtometers | finger (cloth) |
|---|---|
| 1 | = 8.7489063867017 × 10-15 |
| 1.143 × 1014 | = 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 …) |