| 20.8 km * | 0.6213711922 mi | = 12.9245207985 mi | 
| 1 km | 
| Natuurkundige eenheid | Lengte | 
|---|---|
| Nanometer | 2.08e+13 nm | 
| Micrometer | 20800000000.0 µm | 
| Millimeter | 20800000.0 mm | 
| Centimeter | 2080000.0 cm | 
| Inch | 818897.637795 in | 
| Voet | 68241.4698163 ft | 
| Yard | 22747.1566054 yd | 
| Meter | 20800.0 m | 
| Kilometer | 20.8 km | 
| Mijl | 12.9245207985 mi | 
| Zeemijl | 11.2311015119 nmi | 
