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The Hectometer (symbol: hm), or hectometre (International spelling) is an uncommonly used unit of length in the metric system, equal to one hundred meters. It derives f ..more definition+
The siriometer is a rarely used and an obsolete astronomical unit of length, defined to be equal to about one million astronomical units (au). One siriometer is approxim ..more definition+
In relation to the base unit of [length] => (meters), 1 Hectometers (hm) is equal to 100 meters, while 1 Siriometer (sir) = 1.496E+17 meters.| 81 Hectometers | to common length units |
|---|---|
| 81 hm | = 8100 meters (m) |
| 81 hm | = 8.1 kilometers (km) |
| 81 hm | = 810000 centimeters (cm) |
| 81 hm | = 26574.803149606 feet (ft) |
| 81 hm | = 318897.63779528 inches (in) |
| 81 hm | = 8858.2677165354 yards (yd) |
| 81 hm | = 5.0331066571224 miles (mi) |
| 81 hm | = 8.5614628474791E-13 light years (ly) |
| 81 hm | = 30614177.085251 pixels (PX) |
| 81 hm | = 5.0625E+38 planck length (pl) |