| 20 km * | 0.6213711922 mi | = 12.4274238447 mi | 
| 1 km | 
| Fyzikálna jednotka | Jednotka dĺžky | 
|---|---|
| Nanometer | 2e+13 nm | 
| Mikrometer | 20000000000.0 µm | 
| Milimeter | 20000000.0 mm | 
| Centimeter | 2000000.0 cm | 
| Palec | 787401.574803 in | 
| Stopa | 65616.7979003 ft | 
| Yard | 21872.2659668 yd | 
| Meter | 20000.0 m | 
| Kilometer | 20.0 km | 
| Míľa | 12.4274238447 mi | 
| Námorná míľa | 10.7991360691 nmi | 
