| 631 mm * | 0.1 cm | = 63.1 cm | 
| 1 mm | 
| Eenhede van meting | Lengte | 
|---|---|
| Nanometer | 631000000.0 nm | 
| Mikrometer | 631000.0 µm | 
| Millimeter | 631.0 mm | 
| Sentimeter | 63.1 cm | 
| Duim | 24.842519685 in | 
| Voet | 2.0702099738 ft | 
| Jaart | 0.6900699913 yd | 
| Meter | 0.631 m | 
| Kilometer | 0.000631 km | 
| Myl | 0.0003920852 mi | 
| Seemyl | 0.0003407127 nmi | 
