| 491 cm * | 0.3937007874 in | = 193.307086614 in | 
| 1 cm | 
| Natuurkundige eenheid | Lengte-eenheid | 
|---|---|
| Nanometer | 4910000000.0 nm | 
| Micrometer | 4910000.0 µm | 
| Millimeter | 4910.0 mm | 
| Centimeter | 491.0 cm | 
| Inch | 193.307086614 in | 
| Voet | 16.1089238845 ft | 
| Yard | 5.3696412948 yd | 
| Meter | 4.91 m | 
| Kilometer | 0.00491 km | 
| Mijl | 0.0030509326 mi | 
| Zeemijl | 0.0026511879 nmi | 
