| 821 mm * | 0.1 cm | = 82.1 cm | 
| 1 mm | 
| Merska enota | Dolžina | 
|---|---|
| Nanometer | 821000000.0 nm | 
| Mikrometer | 821000.0 µm | 
| Milimeter | 821.0 mm | 
| Centimeter | 82.1 cm | 
| Palec | 32.3228346457 in | 
| Čevelj | 2.6935695538 ft | 
| Jard | 0.8978565179 yd | 
| Meter | 0.821 m | 
| Kilometer | 0.000821 km | 
| Mile | 0.0005101457 mi | 
| navtične milje | 0.0004433045 nmi | 
