| 521 m * | 3.280839895 ft | = 1709.3175853 ft | 
| 1 m | 
| Fyzikálna jednotka | Jednotka dĺžky | 
|---|---|
| Nanometer | 5.21e+11 nm | 
| Mikrometer | 521000000.0 µm | 
| Milimeter | 521000.0 mm | 
| Centimeter | 52100.0 cm | 
| Palec | 20511.8110236 in | 
| Stopa | 1709.3175853 ft | 
| Yard | 569.772528434 yd | 
| Meter | 521.0 m | 
| Kilometer | 0.521 km | 
| Míľa | 0.3237343912 mi | 
| Námorná míľa | 0.2813174946 nmi | 
