| 668 mm * | 0.0393700787 in | = 26.2992125984 in | 
| 1 mm | 
| Mjerna jedinica | Dužina | 
|---|---|
| Nanometar | 668000000.0 nm | 
| mikrometar | 668000.0 µm | 
| Milimetar | 668.0 mm | 
| Centimetar | 66.8 cm | 
| Palac | 26.2992125984 in | 
| Stopa | 2.1916010499 ft | 
| Jard | 0.7305336833 yd | 
| Metar | 0.668 m | 
| Kilometar | 0.000668 km | 
| Milja | 0.000415076 mi | 
| Nautička milja | 0.0003606911 nmi | 
