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A light-year (abbreviation: ly), sometimes referred to incorrectly as a light year, is a unit of length used informally to express astronomical distances. It is approxi ..more definition+
In relation to the base unit of [length] => (meters), 1 Zeptometers (zm) is equal to 1.0E-21 meters, while 1 Light Years (ly) = 9461000000000000 meters.| 21450 Zeptometers | to common length units |
|---|---|
| 21450 zm | = 2.145E-17 meters (m) |
| 21450 zm | = 2.145E-20 kilometers (km) |
| 21450 zm | = 2.145E-15 centimeters (cm) |
| 21450 zm | = 7.0374015748031E-17 feet (ft) |
| 21450 zm | = 8.4448818897638E-16 inches (in) |
| 21450 zm | = 2.3458005249344E-17 yards (yd) |
| 21450 zm | = 1.3328412073491E-20 miles (mi) |
| 21450 zm | = 2.2672021984991E-33 light years (ly) |
| 21450 zm | = 8.1070876355386E-14 pixels (PX) |
| 21450 zm | = 1.340625E+18 planck length (pl) |