cubit | 1 cubit | 2 cubit | 3 cubit | 4 cubit | 5 cubit | 6 cubit | 7 cubit | 8 cubit | 9 cubit | 10 cubit | 11 cubit | 12 cubit | 13 cubit | 14 cubit | 15 cubit | 16 cubit | 17 cubit | 18 cubit | 19 cubit | 20 cubit | 21 cubit | 22 cubit | 23 cubit | 24 cubit | 25 cubit | 26 cubit | 27 cubit | 28 cubit | 29 cubit | 30 cubit | 31 cubit | 32 cubit | 33 cubit | 34 cubit | 35 cubit | 36 cubit | 37 cubit | 38 cubit | 39 cubit | 40 cubit | 41 cubit | 42 cubit | 43 cubit | 44 cubit | 45 cubit | 46 cubit | 47 cubit | 48 cubit | 49 cubit | 50 cubit | 51 cubit | 52 cubit | 53 cubit | 54 cubit | 55 cubit | 56 cubit | 57 cubit | 58 cubit | 59 cubit | 60 cubit | 61 cubit | 62 cubit | 63 cubit | 64 cubit | 65 cubit | 66 cubit | 67 cubit | 68 cubit | 69 cubit | 70 cubit | 71 cubit | 72 cubit | 73 cubit | 74 cubit | 75 cubit | 76 cubit | 77 cubit | 78 cubit | 79 cubit | 80 cubit | 81 cubit | 82 cubit | 83 cubit | 84 cubit | 85 cubit | 86 cubit | 87 cubit | 88 cubit | 89 cubit | 90 cubit | 91 cubit | 92 cubit | 93 cubit | 94 cubit | 95 cubit | 96 cubit | 97 cubit | 98 cubit | 99 cubit | 100 cubit |
fermi | 5.0 × 1014 fm | 1.0 × 1015 fm | 1.5 × 1015 fm | 2.0 × 1015 fm | 2.5 × 1015 fm | 3.0 × 1015 fm | 3.5 × 1015 fm | 4.0 × 1015 fm | 4.5 × 1015 fm | 5.0 × 1015 fm | 5.5 × 1015 fm | 6.0 × 1015 fm | 6.5 × 1015 fm | 7.0 × 1015 fm | 7.5 × 1015 fm | 8.0 × 1015 fm | 8.5 × 1015 fm | 9.0 × 1015 fm | 9.5 × 1015 fm | 1.0 × 1016 fm | 1.05 × 1016 fm | 1.1 × 1016 fm | 1.15 × 1016 fm | 1.2 × 1016 fm | 1.25 × 1016 fm | 1.3 × 1016 fm | 1.35 × 1016 fm | 1.4 × 1016 fm | 1.45 × 1016 fm | 1.5 × 1016 fm | 1.55 × 1016 fm | 1.6 × 1016 fm | 1.65 × 1016 fm | 1.7 × 1016 fm | 1.75 × 1016 fm | 1.8 × 1016 fm | 1.85 × 1016 fm | 1.9 × 1016 fm | 1.95 × 1016 fm | 2.0 × 1016 fm | 2.05 × 1016 fm | 2.1 × 1016 fm | 2.15 × 1016 fm | 2.2 × 1016 fm | 2.25 × 1016 fm | 2.3 × 1016 fm | 2.35 × 1016 fm | 2.4 × 1016 fm | 2.45 × 1016 fm | 2.5 × 1016 fm | 2.55 × 1016 fm | 2.6 × 1016 fm | 2.65 × 1016 fm | 2.7 × 1016 fm | 2.75 × 1016 fm | 2.8 × 1016 fm | 2.85 × 1016 fm | 2.9 × 1016 fm | 2.95 × 1016 fm | 3.0 × 1016 fm | 3.05 × 1016 fm | 3.1 × 1016 fm | 3.15 × 1016 fm | 3.2 × 1016 fm | 3.25 × 1016 fm | 3.3 × 1016 fm | 3.35 × 1016 fm | 3.4 × 1016 fm | 3.45 × 1016 fm | 3.5 × 1016 fm | 3.55 × 1016 fm | 3.6 × 1016 fm | 3.65 × 1016 fm | 3.7 × 1016 fm | 3.75 × 1016 fm | 3.8 × 1016 fm | 3.85 × 1016 fm | 3.9 × 1016 fm | 3.95 × 1016 fm | 4.0 × 1016 fm | 4.05 × 1016 fm | 4.1 × 1016 fm | 4.15 × 1016 fm | 4.2 × 1016 fm | 4.25 × 1016 fm | 4.3 × 1016 fm | 4.35 × 1016 fm | 4.4 × 1016 fm | 4.45 × 1016 fm | 4.5 × 1016 fm | 4.55 × 1016 fm | 4.6 × 1016 fm | 4.65 × 1016 fm | 4.7 × 1016 fm | 4.75 × 1016 fm | 4.8 × 1016 fm | 4.85 × 1016 fm | 4.9 × 1016 fm | 4.95 × 1016 fm | 5.0 × 1016 fm |
The cubit is an ancient unit based on the forearm length from the tip of the middle finger to the bottom of the elbow. Cubits of various lengths were employed in many parts of the world in antiquity, during the Middle Ages and as recently as Early Modern Times. The term is still used in hedge laying, the length of the forearm being frequently used to determine the interval between stakes placed within the hedge.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
cubit | ≡ Distance from fingers to elbow ≈ 18 in | ≈ 0.5 m | Other (Length) |
cubit | fermi | cubit | fermi |
---|---|---|---|
1 | ≈ 5.0E+14 | 4 | ≈ 2.0E+15 |
1.5 | ≈ 7.5E+14 | 4.5 | ≈ 2.25E+15 |
2 | ≈ 1.0E+15 | 5 | ≈ 2.5E+15 |
2.5 | ≈ 1.25E+15 | 5.5 | ≈ 2.75E+15 |
3 | ≈ 1.5E+15 | 6 | ≈ 3.0E+15 |
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 | cubit | fermi | cubit |
---|---|---|---|
1 | ≈ 2.0E-15 | 4 | ≈ 8.0E-15 |
1.5 | ≈ 3.0E-15 | 4.5 | ≈ 9.0E-15 |
2 | ≈ 4.0E-15 | 5 | ≈ 1.0E-14 |
2.5 | ≈ 5.0E-15 | 5.5 | ≈ 1.1E-14 |
3 | ≈ 6.0E-15 | 6 | ≈ 1.2E-14 |
cubit | fermi |
---|---|
1 | ≈ 5.0 × 1014 |
2.0 × 10-15 | ≈ 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 …) |