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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 Femtometers (fm) is equal to 1.0E-15 meters, while 1 Siriometer (sir) = 1.496E+17 meters.| 91 Femtometers | to common length units |
|---|---|
| 91 fm | = 9.1E-14 meters (m) |
| 91 fm | = 9.1E-17 kilometers (km) |
| 91 fm | = 9.1E-12 centimeters (cm) |
| 91 fm | = 2.9855643044619E-13 feet (ft) |
| 91 fm | = 3.5826771653543E-12 inches (in) |
| 91 fm | = 9.9518810148731E-14 yards (yd) |
| 91 fm | = 5.6544778493597E-17 miles (mi) |
| 91 fm | = 9.6184335693901E-30 light years (ly) |
| 91 fm | = 3.4393705120467E-10 pixels (PX) |
| 91 fm | = 5.6875E+21 planck length (pl) |