| 21.5 in * | 0.0254 m | = 0.5461 m | 
| 1 in | 
| Natuurkundige eenheid | Lengtes | 
|---|---|
| Nanometer | 546100000.0 nm | 
| Micrometer | 546100.0 µm | 
| Millimeter | 546.1 mm | 
| Centimeter | 54.61 cm | 
| Inch | 21.5 in | 
| Voet | 1.7916666667 ft | 
| Yard | 0.5972222222 yd | 
| Meter | 0.5461 m | 
| Kilometer | 0.0005461 km | 
| Mijl | 0.0003393308 mi | 
| Zeemijl | 0.0002948704 nmi | 
