| 51 mm * | 0.1 cm | = 5.1 cm | 
| 1 mm | 
| Natuurkundige eenheid | Lengte | 
|---|---|
| Nanometer | 51000000.0 nm | 
| Micrometer | 51000.0 µm | 
| Millimeter | 51.0 mm | 
| Centimeter | 5.1 cm | 
| Inch | 2.0078740157 in | 
| Voet | 0.1673228346 ft | 
| Yard | 0.0557742782 yd | 
| Meter | 0.051 m | 
| Kilometer | 5.1e-05 km | 
| Mijl | 3.16899e-05 mi | 
| Zeemijl | 2.75378e-05 nmi | 
