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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.
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 X Unit (xu) is equal to 1.002004E-13 meters, while 1 Siriometer (sir) = 1.496E+17 meters.| 3981000000 X Unit | to common length units |
|---|---|
| 3981000000 xu | = 0.0003988977924 meters (m) |
| 3981000000 xu | = 3.988977924E-7 kilometers (km) |
| 3981000000 xu | = 0.03988977924 centimeters (cm) |
| 3981000000 xu | = 0.0013087197913386 feet (ft) |
| 3981000000 xu | = 0.015704637496063 inches (in) |
| 3981000000 xu | = 0.00043623993044619 yards (yd) |
| 3981000000 xu | = 2.4786359684443E-7 miles (mi) |
| 3981000000 xu | = 4.2162328760173E-20 light years (ly) |
| 3981000000 xu | = 1.5076453895616 pixels (PX) |
| 3981000000 xu | = 2.4931112025E+31 planck length (pl) |