| 4.2 km * | 0.6213711922 mi | = 2.6097590074 mi | 
| 1 km | 
| Natuurkundige eenheid | Lengte | 
|---|---|
| Nanometer | 4.2e+12 nm | 
| Micrometer | 4200000000.0 µm | 
| Millimeter | 4200000.0 mm | 
| Centimeter | 420000.0 cm | 
| Inch | 165354.330709 in | 
| Voet | 13779.5275591 ft | 
| Yard | 4593.17585302 yd | 
| Meter | 4200.0 m | 
| Kilometer | 4.2 km | 
| Mijl | 2.6097590074 mi | 
| Zeemijl | 2.2678185745 nmi | 
