| 19.9 in * | 0.0254 m | = 0.50546 m | 
| 1 in | 
| Natuurkundige eenheid | Lengte-eenheid | 
|---|---|
| Nanometer | 505460000.0 nm | 
| Micrometer | 505460.0 µm | 
| Millimeter | 505.46 mm | 
| Centimeter | 50.546 cm | 
| Inch | 19.9 in | 
| Voet | 1.6583333333 ft | 
| Yard | 0.5527777778 yd | 
| Meter | 0.50546 m | 
| Kilometer | 0.00050546 km | 
| Mijl | 0.0003140783 mi | 
| Zeemijl | 0.0002729266 nmi | 
