| 664 mm * | 0.1 cm | = 66.4 cm | 
| 1 mm | 
| Natuurkundige eenheid | Lengte-eenheid | 
|---|---|
| Nanometer | 664000000.0 nm | 
| Micrometer | 664000.0 µm | 
| Millimeter | 664.0 mm | 
| Centimeter | 66.4 cm | 
| Inch | 26.1417322835 in | 
| Voet | 2.1784776903 ft | 
| Yard | 0.7261592301 yd | 
| Meter | 0.664 m | 
| Kilometer | 0.000664 km | 
| Mijl | 0.0004125905 mi | 
| Zeemijl | 0.0003585313 nmi | 
