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The stadion (plural: stadia), was an ancient Greek unit of length, based on the length of a typical sports stadium of the time. According to Herodotus, one stadion wa ..more definition+
A unit of length used to measure nuclear distances, = 10−15 meter. Named for the Italian physicist Enrico Fermi (1901–1954). Now obsolete, replaced by the SI term femtometer (symbol, fm); 1 fermi = 1 femtometer.
In relation to the base unit of [length] => (meters), 1 Greek Stadion (std) is equal to 185 meters, while 1 Fermi (fermi) = 1.0E-15 meters.| 21000 Greek Stadion | to common length units |
|---|---|
| 21000 std | = 3885000 meters (m) |
| 21000 std | = 3885 kilometers (km) |
| 21000 std | = 388500000 centimeters (cm) |
| 21000 std | = 12746062.992126 feet (ft) |
| 21000 std | = 152952755.90551 inches (in) |
| 21000 std | = 4248687.664042 yards (yd) |
| 21000 std | = 2414.027081842 miles (mi) |
| 21000 std | = 4.1063312546242E-10 light years (ly) |
| 21000 std | = 14683466416.815 pixels (PX) |
| 21000 std | = 2.428125E+41 planck length (pl) |