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| 21 Rems | to common length units |
|---|---|
| 21 rem | = 0.0888999888 meters (m) |
| 21 rem | = 8.88999888E-5 kilometers (km) |
| 21 rem | = 8.88999888 centimeters (cm) |
| 21 rem | = 0.29166662992126 feet (ft) |
| 21 rem | = 3.4999995590551 inches (in) |
| 21 rem | = 0.097222209973753 yards (yd) |
| 21 rem | = 5.5239892030542E-5 miles (mi) |
| 21 rem | = 9.3964685339816E-18 light years (ly) |
| 21 rem | = 336 pixels (PX) |
| 21 rem | = 5.5562493E+33 planck length (pl) |