| 680 cm * | 0.01 m | = 6.8 m | 
| 1 cm | 
| Fyzikálna jednotka | Jednotka dĺžky | 
|---|---|
| Nanometer | 6800000000.0 nm | 
| Mikrometer | 6800000.0 µm | 
| Milimeter | 6800.0 mm | 
| Centimeter | 680.0 cm | 
| Palec | 267.716535433 in | 
| Stopa | 22.3097112861 ft | 
| Yard | 7.4365704287 yd | 
| Meter | 6.8 m | 
| Kilometer | 0.0068 km | 
| Míľa | 0.0042253241 mi | 
| Námorná míľa | 0.0036717063 nmi | 
