| 821 cm * | 0.01 m | = 8.21 m | 
| 1 cm | 
| Mjerna jedinica | Duljine | 
|---|---|
| Nanometar | 8210000000.0 nm | 
| mikrometar | 8210000.0 µm | 
| Milimetar | 8210.0 mm | 
| Centimetar | 821.0 cm | 
| Palac | 323.228346457 in | 
| Stopa | 26.9356955381 ft | 
| Jard | 8.9785651794 yd | 
| Metar | 8.21 m | 
| Kilometar | 0.00821 km | 
| Milja | 0.0051014575 mi | 
| Nautička milja | 0.0044330454 nmi | 
