| 688 mm * | 0.1 cm | = 68.8 cm | 
| 1 mm | 
| Ölçü birimleri | Uzunlukları | 
|---|---|
| Nanometre | 688000000.0 nm | 
| Mikrometre | 688000.0 µm | 
| Milimetre | 688.0 mm | 
| Santimetre | 68.8 cm | 
| İnç | 27.0866141732 in | 
| Fit | 2.2572178478 ft | 
| Yarda | 0.7524059493 yd | 
| Metre | 0.688 m | 
| Kilometre | 0.000688 km | 
| Mil | 0.0004275034 mi | 
| Deniz mili | 0.0003714903 nmi | 
