| 678 km * | 0.6213711922 mi | = 421.289668337 mi | 
| 1 km | 
| Eenhede van meting | Lengtes | 
|---|---|
| Nanometer | 6.78e+14 nm | 
| Mikrometer | 6.78e+11 µm | 
| Millimeter | 678000000.0 mm | 
| Sentimeter | 67800000.0 cm | 
| Duim | 26692913.3858 in | 
| Voet | 2224409.44882 ft | 
| Jaart | 741469.816273 yd | 
| Meter | 678000.0 m | 
| Kilometer | 678.0 km | 
| Myl | 421.289668337 mi | 
| Seemyl | 366.090712743 nmi | 
