| 640 mm * | 0.0393700787 in | = 25.1968503937 in | 
| 1 mm | 
| Mjerna jedinica | Dužina | 
|---|---|
| Nanometar | 640000000.0 nm | 
| mikrometar | 640000.0 µm | 
| Milimetar | 640.0 mm | 
| Centimetar | 64.0 cm | 
| Palac | 25.1968503937 in | 
| Stopa | 2.0997375328 ft | 
| Jard | 0.6999125109 yd | 
| Metar | 0.64 m | 
| Kilometar | 0.00064 km | 
| Milja | 0.0003976776 mi | 
| Nautička milja | 0.0003455724 nmi | 
