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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 Siriometer (sir) is equal to 1.496E+17 meters, while 1 Femtometers (fm) = 1.0E-15 meters.| 1800 Siriometer | to common length units |
|---|---|
| 1800 sir | = 2.6928E+20 meters (m) |
| 1800 sir | = 2.6928E+17 kilometers (km) |
| 1800 sir | = 2.6928E+22 centimeters (cm) |
| 1800 sir | = 8.8346456692913E+20 feet (ft) |
| 1800 sir | = 1.060157480315E+22 inches (in) |
| 1800 sir | = 2.9448818897638E+20 yards (yd) |
| 1800 sir | = 1.6732283464567E+17 miles (mi) |
| 1800 sir | = 28462.107599619 light years (ly) |
| 1800 sir | = 1.017751309323E+24 pixels (PX) |
| 1800 sir | = 1.683E+55 planck length (pl) |