| 644 cm * | 0.3937007874 in | = 253.543307087 in | 
| 1 cm | 
| Unità | Tul | 
|---|---|
| Nanometru | 6440000000.0 nm | 
| Mikrometru | 6440000.0 µm | 
| Millimetru | 6440.0 mm | 
| ċentimetru | 644.0 cm | 
| Pulzier | 253.543307087 in | 
| Piedi | 21.1286089239 ft | 
| Yard | 7.0428696413 yd | 
| Metru | 6.44 m | 
| Kilometru | 0.00644 km | 
| Mil | 0.0040016305 mi | 
| Mil nawtiku | 0.0034773218 nmi | 
