| 0.4 mm * | 0.0393700787 in | = 0.0157480315 in | 
| 1 mm | 
| Units of measurement | Length | 
|---|---|
| Nanometre | 400000.0 nm | 
| Micrometre | 400.0 µm | 
| Millimetre | 0.4 mm | 
| Centimetre | 0.04 cm | 
| Inch | 0.0157480315 in | 
| Foot | 0.001312336 ft | 
| Yard | 0.0004374453 yd | 
| Metre | 0.0004 m | 
| Kilometre | 4e-07 km | 
| Mile | 2.485e-07 mi | 
| Nautical mile | 2.16e-07 nmi | 
