| 21.8 mm * | 0.1 cm | = 2.18 cm | 
| 1 mm | 
| Fyzikálna jednotka | Jednotka dĺžky | 
|---|---|
| Nanometer | 21800000.0 nm | 
| Mikrometer | 21800.0 µm | 
| Milimeter | 21.8 mm | 
| Centimeter | 2.18 cm | 
| Palec | 0.8582677165 in | 
| Stopa | 0.0715223097 ft | 
| Yard | 0.0238407699 yd | 
| Meter | 0.0218 m | 
| Kilometer | 2.18e-05 km | 
| Míľa | 1.35459e-05 mi | 
| Námorná míľa | 1.17711e-05 nmi | 
