| earth radius | 1 R⊕ | 2 R⊕ | 3 R⊕ | 4 R⊕ | 5 R⊕ | 6 R⊕ | 7 R⊕ | 8 R⊕ | 9 R⊕ | 10 R⊕ | 11 R⊕ | 12 R⊕ | 13 R⊕ | 14 R⊕ | 15 R⊕ | 16 R⊕ | 17 R⊕ | 18 R⊕ | 19 R⊕ | 20 R⊕ | 21 R⊕ | 22 R⊕ | 23 R⊕ | 24 R⊕ | 25 R⊕ | 26 R⊕ | 27 R⊕ | 28 R⊕ | 29 R⊕ | 30 R⊕ | 31 R⊕ | 32 R⊕ | 33 R⊕ | 34 R⊕ | 35 R⊕ | 36 R⊕ | 37 R⊕ | 38 R⊕ | 39 R⊕ | 40 R⊕ | 41 R⊕ | 42 R⊕ | 43 R⊕ | 44 R⊕ | 45 R⊕ | 46 R⊕ | 47 R⊕ | 48 R⊕ | 49 R⊕ | 50 R⊕ | 51 R⊕ | 52 R⊕ | 53 R⊕ | 54 R⊕ | 55 R⊕ | 56 R⊕ | 57 R⊕ | 58 R⊕ | 59 R⊕ | 60 R⊕ | 61 R⊕ | 62 R⊕ | 63 R⊕ | 64 R⊕ | 65 R⊕ | 66 R⊕ | 67 R⊕ | 68 R⊕ | 69 R⊕ | 70 R⊕ | 71 R⊕ | 72 R⊕ | 73 R⊕ | 74 R⊕ | 75 R⊕ | 76 R⊕ | 77 R⊕ | 78 R⊕ | 79 R⊕ | 80 R⊕ | 81 R⊕ | 82 R⊕ | 83 R⊕ | 84 R⊕ | 85 R⊕ | 86 R⊕ | 87 R⊕ | 88 R⊕ | 89 R⊕ | 90 R⊕ | 91 R⊕ | 92 R⊕ | 93 R⊕ | 94 R⊕ | 95 R⊕ | 96 R⊕ | 97 R⊕ | 98 R⊕ | 99 R⊕ | 100 R⊕ |
| finger | 286,659,167.60405 finger (US) | 573,318,335.2081 finger (US) | 859,977,502.81215 finger (US) | 1,146,636,670.4162 finger (US) | 1,433,295,838.0202 finger (US) | 1,719,955,005.6243 finger (US) | 2,006,614,173.2283 finger (US) | 2,293,273,340.8324 finger (US) | 2,579,932,508.4364 finger (US) | 2,866,591,676.0405 finger (US) | 3,153,250,843.6445 finger (US) | 3,439,910,011.2486 finger (US) | 3,726,569,178.8526 finger (US) | 4,013,228,346.4567 finger (US) | 4,299,887,514.0607 finger (US) | 4,586,546,681.6648 finger (US) | 4,873,205,849.2688 finger (US) | 5,159,865,016.8729 finger (US) | 5,446,524,184.4769 finger (US) | 5,733,183,352.081 finger (US) | 6,019,842,519.685 finger (US) | 6,306,501,687.2891 finger (US) | 6,593,160,854.8931 finger (US) | 6,879,820,022.4972 finger (US) | 7,166,479,190.1012 finger (US) | 7,453,138,357.7053 finger (US) | 7,739,797,525.3093 finger (US) | 8,026,456,692.9134 finger (US) | 8,313,115,860.5174 finger (US) | 8,599,775,028.1215 finger (US) | 8,886,434,195.7255 finger (US) | 9,173,093,363.3296 finger (US) | 9,459,752,530.9336 finger (US) | 9,746,411,698.5377 finger (US) | 10,033,070,866.142 finger (US) | 10,319,730,033.746 finger (US) | 10,606,389,201.35 finger (US) | 10,893,048,368.954 finger (US) | 11,179,707,536.558 finger (US) | 11,466,366,704.162 finger (US) | 11,753,025,871.766 finger (US) | 12,039,685,039.37 finger (US) | 12,326,344,206.974 finger (US) | 12,613,003,374.578 finger (US) | 12,899,662,542.182 finger (US) | 13,186,321,709.786 finger (US) | 13,472,980,877.39 finger (US) | 13,759,640,044.994 finger (US) | 14,046,299,212.598 finger (US) | 14,332,958,380.202 finger (US) | 14,619,617,547.807 finger (US) | 14,906,276,715.411 finger (US) | 15,192,935,883.015 finger (US) | 15,479,595,050.619 finger (US) | 15,766,254,218.223 finger (US) | 16,052,913,385.827 finger (US) | 16,339,572,553.431 finger (US) | 16,626,231,721.035 finger (US) | 16,912,890,888.639 finger (US) | 17,199,550,056.243 finger (US) | 17,486,209,223.847 finger (US) | 17,772,868,391.451 finger (US) | 18,059,527,559.055 finger (US) | 18,346,186,726.659 finger (US) | 18,632,845,894.263 finger (US) | 18,919,505,061.867 finger (US) | 19,206,164,229.471 finger (US) | 19,492,823,397.075 finger (US) | 19,779,482,564.679 finger (US) | 20,066,141,732.283 finger (US) | 20,352,800,899.888 finger (US) | 20,639,460,067.492 finger (US) | 20,926,119,235.096 finger (US) | 21,212,778,402.7 finger (US) | 21,499,437,570.304 finger (US) | 21,786,096,737.908 finger (US) | 22,072,755,905.512 finger (US) | 22,359,415,073.116 finger (US) | 22,646,074,240.72 finger (US) | 22,932,733,408.324 finger (US) | 23,219,392,575.928 finger (US) | 23,506,051,743.532 finger (US) | 23,792,710,911.136 finger (US) | 24,079,370,078.74 finger (US) | 24,366,029,246.344 finger (US) | 24,652,688,413.948 finger (US) | 24,939,347,581.552 finger (US) | 25,226,006,749.156 finger (US) | 25,512,665,916.76 finger (US) | 25,799,325,084.364 finger (US) | 26,085,984,251.969 finger (US) | 26,372,643,419.573 finger (US) | 26,659,302,587.177 finger (US) | 26,945,961,754.781 finger (US) | 27,232,620,922.385 finger (US) | 27,519,280,089.989 finger (US) | 27,805,939,257.593 finger (US) | 28,092,598,425.197 finger (US) | 28,379,257,592.801 finger (US) | 28,665,916,760.405 finger (US) |
Earth radius is the distance from Earth's center to its surface, about 6,371 km (3,959 mi). This length is also used as a unit of distance, especially in astronomy and geology, where it is usually denoted by R⊕.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| earth radius | R⊕ | ≈ 6,371 km | ≈ 6,371 km | Science - Astronomy (Length) |
| earth radius | finger | earth radius | finger |
|---|---|---|---|
| 1 | ≈ 286659167.60405 | 4 | ≈ 1146636670.4162 |
| 1.5 | ≈ 429988751.40607 | 4.5 | ≈ 1289966254.2182 |
| 2 | ≈ 573318335.2081 | 5 | ≈ 1433295838.0202 |
| 2.5 | ≈ 716647919.01012 | 5.5 | ≈ 1576625421.8223 |
| 3 | ≈ 859977502.81215 | 6 | ≈ 1719955005.6243 |
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 | finger (US) | ≡ 7⁄8 in | = 0.022225 m | Imperial/US |
| finger | earth radius | finger | earth radius |
|---|---|---|---|
| 1 | ≈ 3.4884633495527E-9 | 4 | ≈ 1.3953853398211E-8 |
| 1.5 | ≈ 5.232695024329E-9 | 4.5 | ≈ 1.5698085072987E-8 |
| 2 | ≈ 6.9769266991053E-9 | 5 | ≈ 1.7442316747763E-8 |
| 2.5 | ≈ 8.7211583738817E-9 | 5.5 | ≈ 1.918654842254E-8 |
| 3 | ≈ 1.0465390048658E-8 | 6 | ≈ 2.0930780097316E-8 |
| earth radius | finger |
|---|---|
| 1 | ≈ 286,659,167.60405 |
| 3.4884633495527 × 10-9 | ≈ 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 …) |