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An inch (abbreviation: in, symbol:(") a double prime) is a unit of length in the imperial and United States customary systems of measurement. Historically, an inch was also ..more definition+
In relation to the base unit of [length] => (meters), 1 Inches (in) is equal to 0.0254 meters, while 1 Micromicrons (μμm) = 1.0E-12 meters.| 21 Inches | to common length units |
|---|---|
| 21 in | = 0.5334 meters (m) |
| 21 in | = 0.0005334 kilometers (km) |
| 21 in | = 53.34 centimeters (cm) |
| 21 in | = 1.75 feet (ft) |
| 21 in | = 21 inches (in) |
| 21 in | = 0.58333333333333 yards (yd) |
| 21 in | = 0.00033143939393939 miles (mi) |
| 21 in | = 5.6378818306733E-17 light years (ly) |
| 21 in | = 2016.0002539843 pixels (PX) |
| 21 in | = 3.33375E+34 planck length (pl) |