x unit | 1 xu | 2 xu | 3 xu | 4 xu | 5 xu | 6 xu | 7 xu | 8 xu | 9 xu | 10 xu | 11 xu | 12 xu | 13 xu | 14 xu | 15 xu | 16 xu | 17 xu | 18 xu | 19 xu | 20 xu | 21 xu | 22 xu | 23 xu | 24 xu | 25 xu | 26 xu | 27 xu | 28 xu | 29 xu | 30 xu | 31 xu | 32 xu | 33 xu | 34 xu | 35 xu | 36 xu | 37 xu | 38 xu | 39 xu | 40 xu | 41 xu | 42 xu | 43 xu | 44 xu | 45 xu | 46 xu | 47 xu | 48 xu | 49 xu | 50 xu | 51 xu | 52 xu | 53 xu | 54 xu | 55 xu | 56 xu | 57 xu | 58 xu | 59 xu | 60 xu | 61 xu | 62 xu | 63 xu | 64 xu | 65 xu | 66 xu | 67 xu | 68 xu | 69 xu | 70 xu | 71 xu | 72 xu | 73 xu | 74 xu | 75 xu | 76 xu | 77 xu | 78 xu | 79 xu | 80 xu | 81 xu | 82 xu | 83 xu | 84 xu | 85 xu | 86 xu | 87 xu | 88 xu | 89 xu | 90 xu | 91 xu | 92 xu | 93 xu | 94 xu | 95 xu | 96 xu | 97 xu | 98 xu | 99 xu | 100 xu |
cubit | 2.0042 × 10-13 cubit | 4.0084 × 10-13 cubit | 6.0126 × 10-13 cubit | 8.0168 × 10-13 cubit | 1.0021 × 10-12 cubit | 1.20252 × 10-12 cubit | 1.40294 × 10-12 cubit | 1.60336 × 10-12 cubit | 1.80378 × 10-12 cubit | 2.0042 × 10-12 cubit | 2.20462 × 10-12 cubit | 2.40504 × 10-12 cubit | 2.60546 × 10-12 cubit | 2.80588 × 10-12 cubit | 3.0063 × 10-12 cubit | 3.20672 × 10-12 cubit | 3.40714 × 10-12 cubit | 3.60756 × 10-12 cubit | 3.80798 × 10-12 cubit | 4.0084 × 10-12 cubit | 4.20882 × 10-12 cubit | 4.40924 × 10-12 cubit | 4.60966 × 10-12 cubit | 4.81008 × 10-12 cubit | 5.0105 × 10-12 cubit | 5.21092 × 10-12 cubit | 5.41134 × 10-12 cubit | 5.61176 × 10-12 cubit | 5.81218 × 10-12 cubit | 6.0126 × 10-12 cubit | 6.21302 × 10-12 cubit | 6.41344 × 10-12 cubit | 6.61386 × 10-12 cubit | 6.81428 × 10-12 cubit | 7.0147 × 10-12 cubit | 7.21512 × 10-12 cubit | 7.41554 × 10-12 cubit | 7.61596 × 10-12 cubit | 7.81638 × 10-12 cubit | 8.0168 × 10-12 cubit | 8.21722 × 10-12 cubit | 8.41764 × 10-12 cubit | 8.61806 × 10-12 cubit | 8.81848 × 10-12 cubit | 9.0189 × 10-12 cubit | 9.21932 × 10-12 cubit | 9.41974 × 10-12 cubit | 9.62016 × 10-12 cubit | 9.82058 × 10-12 cubit | 1.0021 × 10-11 cubit | 1.022142 × 10-11 cubit | 1.042184 × 10-11 cubit | 1.062226 × 10-11 cubit | 1.082268 × 10-11 cubit | 1.10231 × 10-11 cubit | 1.122352 × 10-11 cubit | 1.142394 × 10-11 cubit | 1.162436 × 10-11 cubit | 1.182478 × 10-11 cubit | 1.20252 × 10-11 cubit | 1.222562 × 10-11 cubit | 1.242604 × 10-11 cubit | 1.262646 × 10-11 cubit | 1.282688 × 10-11 cubit | 1.30273 × 10-11 cubit | 1.322772 × 10-11 cubit | 1.342814 × 10-11 cubit | 1.362856 × 10-11 cubit | 1.382898 × 10-11 cubit | 1.40294 × 10-11 cubit | 1.422982 × 10-11 cubit | 1.443024 × 10-11 cubit | 1.463066 × 10-11 cubit | 1.483108 × 10-11 cubit | 1.50315 × 10-11 cubit | 1.523192 × 10-11 cubit | 1.543234 × 10-11 cubit | 1.563276 × 10-11 cubit | 1.583318 × 10-11 cubit | 1.60336 × 10-11 cubit | 1.623402 × 10-11 cubit | 1.643444 × 10-11 cubit | 1.663486 × 10-11 cubit | 1.683528 × 10-11 cubit | 1.70357 × 10-11 cubit | 1.723612 × 10-11 cubit | 1.743654 × 10-11 cubit | 1.763696 × 10-11 cubit | 1.783738 × 10-11 cubit | 1.80378 × 10-11 cubit | 1.823822 × 10-11 cubit | 1.843864 × 10-11 cubit | 1.863906 × 10-11 cubit | 1.883948 × 10-11 cubit | 1.90399 × 10-11 cubit | 1.924032 × 10-11 cubit | 1.944074 × 10-11 cubit | 1.964116 × 10-11 cubit | 1.984158 × 10-11 cubit | 2.0042 × 10-11 cubit |
The x unit (symbol xu) is a unit of length approximately equal to 0.1 pm (10−13 m). It is used to quote the wavelength of X-rays and gamma rays.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
x unit | xu | ≈ 1.0021×10−13 m | ≈ 1.0021×10−13 m | Metric system Non-SI |
x units | cubit | x units | cubit |
---|---|---|---|
1 | ≈ 2.0042E-13 | 4 | ≈ 8.0168E-13 |
1.5 | ≈ 3.0063E-13 | 4.5 | ≈ 9.0189E-13 |
2 | ≈ 4.0084E-13 | 5 | ≈ 1.0021E-12 |
2.5 | ≈ 5.0105E-13 | 5.5 | ≈ 1.10231E-12 |
3 | ≈ 6.0126E-13 | 6 | ≈ 1.20252E-12 |
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 | x units | cubit | x units |
---|---|---|---|
1 | ≈ 4989522003792 | 4 | ≈ 19958088015168 |
1.5 | ≈ 7484283005688.1 | 4.5 | ≈ 22452849017064 |
2 | ≈ 9979044007584.1 | 5 | ≈ 24947610018960 |
2.5 | ≈ 12473805009480 | 5.5 | ≈ 27442371020856 |
3 | ≈ 14968566011376 | 6 | ≈ 29937132022752 |
x units | cubit |
---|---|
1 | ≈ 2.0042 × 10-13 |
4 989 522 003 792 | ≈ 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 …) |