| 509 mm * | 0.0393700787 in | = 20.0393700787 in | 
| 1 mm | 
| Merska enota | Enota dolžine | 
|---|---|
| Nanometer | 509000000.0 nm | 
| Mikrometer | 509000.0 µm | 
| Milimeter | 509.0 mm | 
| Centimeter | 50.9 cm | 
| Palec | 20.0393700787 in | 
| Čevelj | 1.6699475066 ft | 
| Jard | 0.5566491689 yd | 
| Meter | 0.509 m | 
| Kilometer | 0.000509 km | 
| Mile | 0.0003162779 mi | 
| navtične milje | 0.000274838 nmi | 
