| 30.8 mm * | 0.1 cm | = 3.08 cm | 
| 1 mm | 
| Units of measurement | Lengths | 
|---|---|
| Nanometre | 30800000.0 nm | 
| Micrometre | 30800.0 µm | 
| Millimetre | 30.8 mm | 
| Centimetre | 3.08 cm | 
| Inch | 1.2125984252 in | 
| Foot | 0.1010498688 ft | 
| Yard | 0.0336832896 yd | 
| Metre | 0.0308 m | 
| Kilometre | 3.08e-05 km | 
| Mile | 1.91382e-05 mi | 
| Nautical mile | 1.66307e-05 nmi | 
