| 664 cm * | 0.032808399 ft | = 21.7847769029 ft | 
| 1 cm | 
| Eenhede van meting | Lengtes | 
|---|---|
| Nanometer | 6640000000.0 nm | 
| Mikrometer | 6640000.0 µm | 
| Millimeter | 6640.0 mm | 
| Sentimeter | 664.0 cm | 
| Duim | 261.417322835 in | 
| Voet | 21.7847769029 ft | 
| Jaart | 7.261592301 yd | 
| Meter | 6.64 m | 
| Kilometer | 0.00664 km | 
| Myl | 0.0041259047 mi | 
| Seemyl | 0.0035853132 nmi | 
