| 2.1 mm * | 0.0393700787 in | = 0.0826771654 in | 
| 1 mm | 
| Units of measurement | Length | 
|---|---|
| Nanometre | 2100000.0 nm | 
| Micrometre | 2100.0 µm | 
| Millimetre | 2.1 mm | 
| Centimetre | 0.21 cm | 
| Inch | 0.0826771654 in | 
| Foot | 0.0068897638 ft | 
| Yard | 0.0022965879 yd | 
| Metre | 0.0021 m | 
| Kilometre | 2.1e-06 km | 
| Mile | 1.3049e-06 mi | 
| Nautical mile | 1.1339e-06 nmi | 
