| megameter | 1 Mm | 2 Mm | 3 Mm | 4 Mm | 5 Mm | 6 Mm | 7 Mm | 8 Mm | 9 Mm | 10 Mm | 11 Mm | 12 Mm | 13 Mm | 14 Mm | 15 Mm | 16 Mm | 17 Mm | 18 Mm | 19 Mm | 20 Mm | 21 Mm | 22 Mm | 23 Mm | 24 Mm | 25 Mm | 26 Mm | 27 Mm | 28 Mm | 29 Mm | 30 Mm | 31 Mm | 32 Mm | 33 Mm | 34 Mm | 35 Mm | 36 Mm | 37 Mm | 38 Mm | 39 Mm | 40 Mm | 41 Mm | 42 Mm | 43 Mm | 44 Mm | 45 Mm | 46 Mm | 47 Mm | 48 Mm | 49 Mm | 50 Mm | 51 Mm | 52 Mm | 53 Mm | 54 Mm | 55 Mm | 56 Mm | 57 Mm | 58 Mm | 59 Mm | 60 Mm | 61 Mm | 62 Mm | 63 Mm | 64 Mm | 65 Mm | 66 Mm | 67 Mm | 68 Mm | 69 Mm | 70 Mm | 71 Mm | 72 Mm | 73 Mm | 74 Mm | 75 Mm | 76 Mm | 77 Mm | 78 Mm | 79 Mm | 80 Mm | 81 Mm | 82 Mm | 83 Mm | 84 Mm | 85 Mm | 86 Mm | 87 Mm | 88 Mm | 89 Mm | 90 Mm | 91 Mm | 92 Mm | 93 Mm | 94 Mm | 95 Mm | 96 Mm | 97 Mm | 98 Mm | 99 Mm | 100 Mm |
| fermi | 1.0 × 1021 fm | 2.0 × 1021 fm | 3.0 × 1021 fm | 4.0 × 1021 fm | 5.0 × 1021 fm | 6.0 × 1021 fm | 7.0 × 1021 fm | 8.0 × 1021 fm | 9.0 × 1021 fm | 1.0 × 1022 fm | 1.1 × 1022 fm | 1.2 × 1022 fm | 1.3 × 1022 fm | 1.4 × 1022 fm | 1.5 × 1022 fm | 1.6 × 1022 fm | 1.7 × 1022 fm | 1.8 × 1022 fm | 1.9 × 1022 fm | 2.0 × 1022 fm | 2.1 × 1022 fm | 2.2 × 1022 fm | 2.3 × 1022 fm | 2.4 × 1022 fm | 2.5 × 1022 fm | 2.6 × 1022 fm | 2.7 × 1022 fm | 2.8 × 1022 fm | 2.9 × 1022 fm | 3.0 × 1022 fm | 3.1 × 1022 fm | 3.2 × 1022 fm | 3.3 × 1022 fm | 3.4 × 1022 fm | 3.5 × 1022 fm | 3.6 × 1022 fm | 3.7 × 1022 fm | 3.8 × 1022 fm | 3.9 × 1022 fm | 4.0 × 1022 fm | 4.1 × 1022 fm | 4.2 × 1022 fm | 4.3 × 1022 fm | 4.4 × 1022 fm | 4.5 × 1022 fm | 4.6 × 1022 fm | 4.7 × 1022 fm | 4.8 × 1022 fm | 4.9 × 1022 fm | 5.0 × 1022 fm | 5.1 × 1022 fm | 5.2 × 1022 fm | 5.3 × 1022 fm | 5.4 × 1022 fm | 5.5 × 1022 fm | 5.6 × 1022 fm | 5.7 × 1022 fm | 5.8 × 1022 fm | 5.9 × 1022 fm | 6.0 × 1022 fm | 6.1 × 1022 fm | 6.2 × 1022 fm | 6.3 × 1022 fm | 6.4 × 1022 fm | 6.5 × 1022 fm | 6.6 × 1022 fm | 6.7 × 1022 fm | 6.8 × 1022 fm | 6.9 × 1022 fm | 7.0 × 1022 fm | 7.1 × 1022 fm | 7.2 × 1022 fm | 7.3 × 1022 fm | 7.4 × 1022 fm | 7.5 × 1022 fm | 7.6 × 1022 fm | 7.7 × 1022 fm | 7.8 × 1022 fm | 7.9 × 1022 fm | 8.0 × 1022 fm | 8.1 × 1022 fm | 8.2 × 1022 fm | 8.3 × 1022 fm | 8.4 × 1022 fm | 8.5 × 1022 fm | 8.6 × 1022 fm | 8.7 × 1022 fm | 8.8 × 1022 fm | 8.9 × 1022 fm | 9.0 × 1022 fm | 9.1 × 1022 fm | 9.2 × 1022 fm | 9.3 × 1022 fm | 9.4 × 1022 fm | 9.5 × 1022 fm | 9.6 × 1022 fm | 9.7 × 1022 fm | 9.8 × 1022 fm | 9.9 × 1022 fm | 1.0 × 1023 fm |
Megameter or megametre is a metric unit of length or distance. It is equal to 1 000 000 meters. Megametres are also occasionally found in science fiction. Plural name is megameters.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| megameter | Mm | ≡ 1×106 m | ≡ 1×106 m | Metric system SI |
| megameters | fermi | megameters | fermi |
|---|---|---|---|
| 1 | ≡ 1.0E+21 | 4 | ≡ 4.0E+21 |
| 1.5 | ≡ 1.5E+21 | 4.5 | ≡ 4.5E+21 |
| 2 | ≡ 2.0E+21 | 5 | ≡ 5.0E+21 |
| 2.5 | ≡ 2.5E+21 | 5.5 | ≡ 5.5E+21 |
| 3 | ≡ 3.0E+21 | 6 | ≡ 6.0E+21 |
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 |
|---|---|---|---|---|
| fermi | fm | ≡ 1×10−15 m | ≡ 1×10−15 m | Metric system Non-SI |
| fermi | megameters | fermi | megameters |
|---|---|---|---|
| 1 | ≡ 1.0E-21 | 4 | ≡ 4.0E-21 |
| 1.5 | ≡ 1.5E-21 | 4.5 | ≡ 4.5E-21 |
| 2 | ≡ 2.0E-21 | 5 | ≡ 5.0E-21 |
| 2.5 | ≡ 2.5E-21 | 5.5 | ≡ 5.5E-21 |
| 3 | ≡ 3.0E-21 | 6 | ≡ 6.0E-21 |
| megameters | fermi |
|---|---|
| 1 | ≡ 1.0 × 1021 |
| 1.0 × 10-21 | ≡ 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 …) |