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Centimeter (symbol: cm), or centimetre (British spelling) is a unit of length in the metric system, equal to one hundredth of a meter, centi being the SI prefix for a ..more definition+
The line (abbreviated L or l) was a small English unit of length, variously reckoned as 1/10, 1/12, 1/16, or 1/40 of an inch. It was not included among the units authoriz ..more definition+
In relation to the base unit of [length] => (meters), 1 Centimeters (cm) is equal to 0.01 meters, while 1 Lines (l) = 0.0021 meters.| 21 Centimeters | to common length units |
|---|---|
| 21 cm | = 0.21 meters (m) |
| 21 cm | = 0.00021 kilometers (km) |
| 21 cm | = 21 centimeters (cm) |
| 21 cm | = 0.68897637795276 feet (ft) |
| 21 cm | = 8.2677165354331 inches (in) |
| 21 cm | = 0.22965879265092 yards (yd) |
| 21 cm | = 0.00013048795036984 miles (mi) |
| 21 cm | = 2.2196385160131E-17 light years (ly) |
| 21 cm | = 793.70088739539 pixels (PX) |
| 21 cm | = 1.3125E+34 planck length (pl) |