| 21 km * | 0.6213711922 mi | = 13.048795037 mi |
| 1 km |
| Mjerna jedinica | Dužina |
|---|---|
| Nanometar | 2.1e+13 nm |
| mikrometar | 21000000000.0 µm |
| Milimetar | 21000000.0 mm |
| Centimetar | 2100000.0 cm |
| Palac | 826771.653543 in |
| Stopa | 68897.6377953 ft |
| Jard | 22965.8792651 yd |
| Metar | 21000.0 m |
| Kilometar | 21.0 km |
| Milja | 13.048795037 mi |
| Nautička milja | 11.3390928726 nmi |
