| 840 in * | 2.54 cm | = 2133.6 cm | 
| 1 in | 
| Måleenhed | Længde | 
|---|---|
| Nanometer | 21336000000.0 nm | 
| Mikrometer | 21336000.0 µm | 
| Nillimeter | 21336.0 mm | 
| Centimeter | 2133.6 cm | 
| Tomme | 840.0 in | 
| Fod | 70.0 ft | 
| Yard | 23.3333333333 yd | 
| Meter | 21.336 m | 
| Kilometer | 0.021336 km | 
| Nil | 0.0132575758 mi | 
| Sømil | 0.0115205184 nmi | 
