| 666 mm * | 0.1 cm | = 66.6 cm | 
| 1 mm | 
| Måleenhed | Længde | 
|---|---|
| Nanometer | 666000000.0 nm | 
| Mikrometer | 666000.0 µm | 
| Nillimeter | 666.0 mm | 
| Centimeter | 66.6 cm | 
| Tomme | 26.2204724409 in | 
| Fod | 2.1850393701 ft | 
| Yard | 0.7283464567 yd | 
| Meter | 0.666 m | 
| Kilometer | 0.000666 km | 
| Nil | 0.0004138332 mi | 
| Sømil | 0.0003596112 nmi | 
