| 688 mm * | 0.1 cm | = 68.8 cm | 
| 1 mm | 
| Merska enota | Dolžina | 
|---|---|
| Nanometer | 688000000.0 nm | 
| Mikrometer | 688000.0 µm | 
| Milimeter | 688.0 mm | 
| Centimeter | 68.8 cm | 
| Palec | 27.0866141732 in | 
| Čevelj | 2.2572178478 ft | 
| Jard | 0.7524059493 yd | 
| Meter | 0.688 m | 
| Kilometer | 0.000688 km | 
| Mile | 0.0004275034 mi | 
| navtične milje | 0.0003714903 nmi | 
