| 21000 cm * | 0.032808399 ft | = 688.976377952 ft | 
| 1 cm | 
| Mõõtühik | Pikkused | 
|---|---|
| nanomeeter | 2.1e+11 nm | 
| Mikromeeter | 210000000.0 µm | 
| Millimeeter | 210000.0 mm | 
| Sentimeeter | 21000.0 cm | 
| Toll | 8267.71653544 in | 
| Jalg | 688.976377952 ft | 
| Õu | 229.658792651 yd | 
| Meeter | 210.0 m | 
| Kilomeeter | 0.21 km | 
| Miil | 0.1304879504 mi | 
| Meremiil | 0.1133909287 nmi | 
