| 640 km * | 0.6213711922 mi | = 397.677563032 mi | 
| 1 km | 
| Merska enota | Dolžine | 
|---|---|
| Nanometer | 6.4e+14 nm | 
| Mikrometer | 6.4e+11 µm | 
| Milimeter | 640000000.0 mm | 
| Centimeter | 64000000.0 cm | 
| Palec | 25196850.3937 in | 
| Čevelj | 2099737.53281 ft | 
| Jard | 699912.510936 yd | 
| Meter | 640000.0 m | 
| Kilometer | 640.0 km | 
| Mile | 397.677563032 mi | 
| navtične milje | 345.572354212 nmi | 
