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In physics, the Planck length, denoted ℓP, is a unit of length, equal to 1.616229(38)×10−35 meters. It is a base unit in the system of Planck units, develo ..more definition+
In relation to the base unit of [length] => (meters), 1 Planck Length (pl) is equal to 1.6E-35 meters, while 1 Zeptometers (zm) = 1.0E-21 meters.| 21 Planck Length | to common length units |
|---|---|
| 21 pl | = 3.36E-34 meters (m) |
| 21 pl | = 3.36E-37 kilometers (km) |
| 21 pl | = 3.36E-32 centimeters (cm) |
| 21 pl | = 1.1023622047244E-33 feet (ft) |
| 21 pl | = 1.3228346456693E-32 inches (in) |
| 21 pl | = 3.6745406824147E-34 yards (yd) |
| 21 pl | = 2.0878072059174E-37 miles (mi) |
| 21 pl | = 3.551421625621E-50 light years (ly) |
| 21 pl | = 1.2699214198326E-30 pixels (PX) |
| 21 pl | = 21 planck length (pl) |