| 421 mm * | 0.1 cm | = 42.1 cm | 
| 1 mm | 
| Mjerna jedinica | Jedinica za duljinu | 
|---|---|
| Nanometar | 421000000.0 nm | 
| mikrometar | 421000.0 µm | 
| Milimetar | 421.0 mm | 
| Centimetar | 42.1 cm | 
| Palac | 16.5748031496 in | 
| Stopa | 1.3812335958 ft | 
| Jard | 0.4604111986 yd | 
| Metar | 0.421 m | 
| Kilometar | 0.000421 km | 
| Milja | 0.0002615973 mi | 
| Nautička milja | 0.0002273218 nmi | 
