| 4.2 mm * | 0.0393700787 in | = 0.1653543307 in | 
| 1 mm | 
| Units of measurement | Length | 
|---|---|
| Nanometre | 4200000.0 nm | 
| Micrometre | 4200.0 µm | 
| Millimetre | 4.2 mm | 
| Centimetre | 0.42 cm | 
| Inch | 0.1653543307 in | 
| Foot | 0.0137795276 ft | 
| Yard | 0.0045931759 yd | 
| Metre | 0.0042 m | 
| Kilometre | 4.2e-06 km | 
| Mile | 2.6098e-06 mi | 
| Nautical mile | 2.2678e-06 nmi | 
