| 420 cm * | 0.01 m | = 4.2 m | 
| 1 cm | 
| Natuurkundige eenheid | Lengte-eenheid | 
|---|---|
| Nanometer | 4200000000.0 nm | 
| Micrometer | 4200000.0 µm | 
| Millimeter | 4200.0 mm | 
| Centimeter | 420.0 cm | 
| Inch | 165.354330709 in | 
| Voet | 13.7795275591 ft | 
| Yard | 4.593175853 yd | 
| Meter | 4.2 m | 
| Kilometer | 0.0042 km | 
| Mijl | 0.002609759 mi | 
| Zeemijl | 0.0022678186 nmi | 
