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The mile (abbreviation: mi) is a unit of distance on land in English-speaking countries equal to 5280 feet, or 1760 yards (1.609 kilometers). The mile was usually abbreviate ..more definition+
The light-second is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space ..more definition+
In relation to the base unit of [length] => (meters), 1 Miles (mi) is equal to 1609.344 meters, while 1 Light Seconds (ls) = 299800000 meters.| 21 Miles | to common length units |
|---|---|
| 21 mi | = 33796.224 meters (m) |
| 21 mi | = 33.796224 kilometers (km) |
| 21 mi | = 3379622.4 centimeters (cm) |
| 21 mi | = 110880 feet (ft) |
| 21 mi | = 1330560 inches (in) |
| 21 mi | = 36960 yards (yd) |
| 21 mi | = 21 miles (mi) |
| 21 mi | = 3.5721619279146E-12 light years (ly) |
| 21 mi | = 127733776.09244 pixels (PX) |
| 21 mi | = 2.112264E+39 planck length (pl) |