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 |
zeptometer | 1 000 000 zm | 2 000 000 zm | 3 000 000 zm | 4 000 000 zm | 5 000 000 zm | 6 000 000 zm | 7 000 000 zm | 8 000 000 zm | 9 000 000 zm | 10 000 000 zm | 11 000 000 zm | 12 000 000 zm | 13 000 000 zm | 14 000 000 zm | 15 000 000 zm | 16 000 000 zm | 17 000 000 zm | 18 000 000 zm | 19 000 000 zm | 20 000 000 zm | 21 000 000 zm | 22 000 000 zm | 23 000 000 zm | 24 000 000 zm | 25 000 000 zm | 26 000 000 zm | 27 000 000 zm | 28 000 000 zm | 29 000 000 zm | 30 000 000 zm | 31 000 000 zm | 32 000 000 zm | 33 000 000 zm | 34 000 000 zm | 35 000 000 zm | 36 000 000 zm | 37 000 000 zm | 38 000 000 zm | 39 000 000 zm | 40 000 000 zm | 41 000 000 zm | 42 000 000 zm | 43 000 000 zm | 44 000 000 zm | 45 000 000 zm | 46 000 000 zm | 47 000 000 zm | 48 000 000 zm | 49 000 000 zm | 50 000 000 zm | 51 000 000 zm | 52 000 000 zm | 53 000 000 zm | 54 000 000 zm | 55 000 000 zm | 56 000 000 zm | 57 000 000 zm | 58 000 000 zm | 59 000 000 zm | 60 000 000 zm | 61 000 000 zm | 62 000 000 zm | 63 000 000 zm | 64 000 000 zm | 65 000 000 zm | 66 000 000 zm | 67 000 000 zm | 68 000 000 zm | 69 000 000 zm | 70 000 000 zm | 71 000 000 zm | 72 000 000 zm | 73 000 000 zm | 74 000 000 zm | 75 000 000 zm | 76 000 000 zm | 77 000 000 zm | 78 000 000 zm | 79 000 000 zm | 80 000 000 zm | 81 000 000 zm | 82 000 000 zm | 83 000 000 zm | 84 000 000 zm | 85 000 000 zm | 86 000 000 zm | 87 000 000 zm | 88 000 000 zm | 89 000 000 zm | 90 000 000 zm | 91 000 000 zm | 92 000 000 zm | 93 000 000 zm | 94 000 000 zm | 95 000 000 zm | 96 000 000 zm | 97 000 000 zm | 98 000 000 zm | 99 000 000 zm | 100 000 000 zm |
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 | zeptometers | fermtometers | zeptometers |
---|---|---|---|
1 | ≡ 1000000 | 4 | ≡ 4000000 |
1.5 | ≡ 1500000 | 4.5 | ≡ 4500000 |
2 | ≡ 2000000 | 5 | ≡ 5000000 |
2.5 | ≡ 2500000 | 5.5 | ≡ 5500000 |
3 | ≡ 3000000 | 6 | ≡ 6000000 |
An zeptometer is a unit of length, a combination of the metric prefix zepto (symbol z) and the SI unit of length meter (symbol m), equal to 10−21 meter or 1.0E-21 meter and its symbol is zm. Plural name is zeptometers.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
zeptometer | zm | ≡ 1×10-21 m | ≡ 1×10-21 m | Metric system SI |
zeptometers | fermtometers | zeptometers | fermtometers |
---|---|---|---|
1 | ≡ 1.0E-6 | 4 | ≡ 4.0E-6 |
1.5 | ≡ 1.5E-6 | 4.5 | ≡ 4.5E-6 |
2 | ≡ 2.0E-6 | 5 | ≡ 5.0E-6 |
2.5 | ≡ 2.5E-6 | 5.5 | ≡ 5.5E-6 |
3 | ≡ 3.0E-6 | 6 | ≡ 6.0E-6 |
fermtometers | zeptometers |
---|---|
1 | ≡ 1 000 000 |
1.0 × 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 …) |