| 821 cm * | 0.01 m | = 8.21 m | 
| 1 cm | 
| Eenhede van meting | Lengtes | 
|---|---|
| Nanometer | 8210000000.0 nm | 
| Mikrometer | 8210000.0 µm | 
| Millimeter | 8210.0 mm | 
| Sentimeter | 821.0 cm | 
| Duim | 323.228346457 in | 
| Voet | 26.9356955381 ft | 
| Jaart | 8.9785651794 yd | 
| Meter | 8.21 m | 
| Kilometer | 0.00821 km | 
| Myl | 0.0051014575 mi | 
| Seemyl | 0.0044330454 nmi | 
