| 639 cm * | 0.3937007874 in | = 251.57480315 in | 
| 1 cm | 
| Mjerna jedinica | Duljine | 
|---|---|
| Nanometar | 6390000000.0 nm | 
| mikrometar | 6390000.0 µm | 
| Milimetar | 6390.0 mm | 
| Centimetar | 639.0 cm | 
| Palac | 251.57480315 in | 
| Stopa | 20.9645669291 ft | 
| Jard | 6.9881889764 yd | 
| Metar | 6.39 m | 
| Kilometar | 0.00639 km | 
| Milja | 0.0039705619 mi | 
| Nautička milja | 0.003450324 nmi | 
