| 645 cm * | 0.3937007874 in | = 253.937007874 in | 
| 1 cm | 
| Måleenhet | Lengdeenhet | 
|---|---|
| Nanometer | 6450000000.0 nm | 
| Mikrometer | 6450000.0 µm | 
| Millimeter | 6450.0 mm | 
| Centimeter | 645.0 cm | 
| Tomme | 253.937007874 in | 
| Fot | 21.1614173228 ft | 
| Yard | 7.0538057743 yd | 
| Meter | 6.45 m | 
| Kilometer | 0.00645 km | 
| Engelsk mil | 0.0040078442 mi | 
| Nautisk mil | 0.0034827214 nmi | 
