| 20.5 mm * | 0.0393700787 in | = 0.8070866142 in | 
| 1 mm | 
| Natuurkundige eenheid | Lengte-eenheid | 
|---|---|
| Nanometer | 20500000.0 nm | 
| Micrometer | 20500.0 µm | 
| Millimeter | 20.5 mm | 
| Centimeter | 2.05 cm | 
| Inch | 0.8070866142 in | 
| Voet | 0.0672572178 ft | 
| Yard | 0.0224190726 yd | 
| Meter | 0.0205 m | 
| Kilometer | 2.05e-05 km | 
| Mijl | 1.27381e-05 mi | 
| Zeemijl | 1.10691e-05 nmi | 
