| 521 mm * | 0.1 cm | = 52.1 cm | 
| 1 mm | 
| Jednostka miary | Długość | 
|---|---|
| Nanometr | 521000000.0 nm | 
| Mikrometr | 521000.0 µm | 
| Milimetr | 521.0 mm | 
| Centymetr | 52.1 cm | 
| Cal | 20.5118110236 in | 
| Stopa | 1.7093175853 ft | 
| Jard | 0.5697725284 yd | 
| Metr | 0.521 m | 
| Kilometr | 0.000521 km | 
| Mila | 0.0003237344 mi | 
| Mila morska | 0.0002813175 nmi | 
