| 691 mm * | 0.1 cm | = 69.1 cm | 
| 1 mm | 
| Units of measurement | Unit of length | 
|---|---|
| Nanometre | 691000000.0 nm | 
| Micrometre | 691000.0 µm | 
| Millimetre | 691.0 mm | 
| Centimetre | 69.1 cm | 
| Inch | 27.2047244094 in | 
| Foot | 2.2670603675 ft | 
| Yard | 0.7556867892 yd | 
| Metre | 0.691 m | 
| Kilometre | 0.000691 km | 
| Mile | 0.0004293675 mi | 
| Nautical mile | 0.0003731102 nmi | 
