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A rack unit (abbreviated U or RU) is a unit of measure defined as 1.75 inches (44.45 mm). It is most frequently used as a measurement of the overall height of 19-inch and ..more definition+
In relation to the base unit of [length] => (meters), 1 Light Days (ld) is equal to 25900000000000 meters, while 1 Rack Unit (ru) = 0.04445 meters.| 641000000 Light Days | to common length units |
|---|---|
| 641000000 ld | = 1.66019E+22 meters (m) |
| 641000000 ld | = 1.66019E+19 kilometers (km) |
| 641000000 ld | = 1.66019E+24 centimeters (cm) |
| 641000000 ld | = 5.4468175853018E+22 feet (ft) |
| 641000000 ld | = 6.5361811023622E+23 inches (in) |
| 641000000 ld | = 1.8156058617673E+22 yards (yd) |
| 641000000 ld | = 1.0315942396405E+19 miles (mi) |
| 641000000 ld | = 1754772.2228094 light years (ly) |
| 641000000 ld | = 6.2747346487855E+25 pixels (PX) |
| 641000000 ld | = 1.03761875E+57 planck length (pl) |