| 668 cm * | 0.032808399 ft | = 21.9160104987 ft | 
| 1 cm | 
| Mõõtühik | Pikkusühiku | 
|---|---|
| nanomeeter | 6680000000.0 nm | 
| Mikromeeter | 6680000.0 µm | 
| Millimeeter | 6680.0 mm | 
| Sentimeeter | 668.0 cm | 
| Toll | 262.992125984 in | 
| Jalg | 21.9160104987 ft | 
| Õu | 7.3053368329 yd | 
| Meeter | 6.68 m | 
| Kilomeeter | 0.00668 km | 
| Miil | 0.0041507596 mi | 
| Meremiil | 0.0036069114 nmi | 
