| 8.1 mm * | 0.0393700787 in | = 0.3188976378 in | 
| 1 mm | 
| Fyzikálna jednotka | Jednotka dĺžky | 
|---|---|
| Nanometer | 8100000.0 nm | 
| Mikrometer | 8100.0 µm | 
| Milimeter | 8.1 mm | 
| Centimeter | 0.81 cm | 
| Palec | 0.3188976378 in | 
| Stopa | 0.0265748031 ft | 
| Yard | 0.0088582677 yd | 
| Meter | 0.0081 m | 
| Kilometer | 8.1e-06 km | 
| Míľa | 5.0331e-06 mi | 
| Námorná míľa | 4.3737e-06 nmi | 
