| 821 mm * | 0.1 cm | = 82.1 cm | 
| 1 mm | 
| Mjerna jedinica | Dužina | 
|---|---|
| Nanometar | 821000000.0 nm | 
| mikrometar | 821000.0 µm | 
| Milimetar | 821.0 mm | 
| Centimetar | 82.1 cm | 
| Palac | 32.3228346457 in | 
| Stopa | 2.6935695538 ft | 
| Jard | 0.8978565179 yd | 
| Metar | 0.821 m | 
| Kilometar | 0.000821 km | 
| Milja | 0.0005101457 mi | 
| Nautička milja | 0.0004433045 nmi | 
