| 681 mm * | 0.1 cm | = 68.1 cm | 
| 1 mm | 
| Eenhede van meting | Lengtes | 
|---|---|
| Nanometer | 681000000.0 nm | 
| Mikrometer | 681000.0 µm | 
| Millimeter | 681.0 mm | 
| Sentimeter | 68.1 cm | 
| Duim | 26.811023622 in | 
| Voet | 2.2342519685 ft | 
| Jaart | 0.7447506562 yd | 
| Meter | 0.681 m | 
| Kilometer | 0.000681 km | 
| Myl | 0.0004231538 mi | 
| Seemyl | 0.0003677106 nmi | 
