| 3.1 mm * | 0.1 cm | = 0.31 cm | 
| 1 mm | 
| Fyzikálna jednotka | Dĺžky | 
|---|---|
| Nanometer | 3100000.0 nm | 
| Mikrometer | 3100.0 µm | 
| Milimeter | 3.1 mm | 
| Centimeter | 0.31 cm | 
| Palec | 0.1220472441 in | 
| Stopa | 0.0101706037 ft | 
| Yard | 0.0033902012 yd | 
| Meter | 0.0031 m | 
| Kilometer | 3.1e-06 km | 
| Míľa | 1.9263e-06 mi | 
| Námorná míľa | 1.6739e-06 nmi | 
