| 256 km * | 0.6213711922 mi | = 159.071025213 mi | 
| 1 km | 
| Måleenhed | Længde | 
|---|---|
| Nanometer | 2.56e+14 nm | 
| Mikrometer | 2.56e+11 µm | 
| Nillimeter | 256000000.0 mm | 
| Centimeter | 25600000.0 cm | 
| Tomme | 10078740.1575 in | 
| Fod | 839895.013123 ft | 
| Yard | 279965.004374 yd | 
| Meter | 256000.0 m | 
| Kilometer | 256.0 km | 
| Nil | 159.071025213 mi | 
| Sømil | 138.228941685 nmi | 
