| 840 km * | 0.6213711922 mi | = 521.951801479 mi | 
| 1 km | 
| Unidad de medida | Longitudes | 
|---|---|
| Nanómetro | 8.4e+14 nm | 
| Micrómetro | 8.4e+11 µm | 
| Milímetro | 840000000.0 mm | 
| Centímetro | 84000000.0 cm | 
| Pulgada | 33070866.1417 in | 
| Pie | 2755905.51181 ft | 
| Yarda | 918635.170604 yd | 
| Metro | 840000.0 m | 
| Kilómetro | 840.0 km | 
| Milla | 521.951801479 mi | 
| Milla náutica | 453.563714903 nmi | 
