| 688 cm * | 0.3937007874 in | = 270.866141732 in | 
| 1 cm | 
| Unidad de medida | Unidad de longitud | 
|---|---|
| Nanómetro | 6880000000.0 nm | 
| Micrómetro | 6880000.0 µm | 
| Milímetro | 6880.0 mm | 
| Centímetro | 688.0 cm | 
| Pulgada | 270.866141732 in | 
| Pie | 22.5721784777 ft | 
| Yarda | 7.5240594926 yd | 
| Metro | 6.88 m | 
| Kilómetro | 0.00688 km | 
| Milla | 0.0042750338 mi | 
| Milla náutica | 0.0037149028 nmi | 
