| 991 cm * | 0.01 m | = 9.91 m | 
| 1 cm | 
| Unidad de medida | Longitudes | 
|---|---|
| Nanómetro | 9910000000.0 nm | 
| Micrómetro | 9910000.0 µm | 
| Milímetro | 9910.0 mm | 
| Centímetro | 991.0 cm | 
| Pulgada | 390.157480315 in | 
| Pie | 32.5131233596 ft | 
| Yarda | 10.8377077865 yd | 
| Metro | 9.91 m | 
| Kilómetro | 0.00991 km | 
| Milla | 0.0061577885 mi | 
| Milla náutica | 0.0053509719 nmi | 
