| 631 cm * | 0.032808399 ft | = 20.7020997375 ft | 
| 1 cm | 
| Unidad de medida | Longitudes | 
|---|---|
| Nanómetro | 6310000000.0 nm | 
| Micrómetro | 6310000.0 µm | 
| Milímetro | 6310.0 mm | 
| Centímetro | 631.0 cm | 
| Pulgada | 248.425196851 in | 
| Pie | 20.7020997375 ft | 
| Yarda | 6.9006999125 yd | 
| Metro | 6.31 m | 
| Kilómetro | 0.00631 km | 
| Milla | 0.0039208522 mi | 
| Milla náutica | 0.0034071274 nmi | 
