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21 km to miles
| Symbol Name | Value | Unit |
|---|---|---|
| Input Value | 21.00 | km |
| Output Value | 0 | miles |
| Formula: |
|---|
| 21.00 km * 0.621371 = 0 miles |
| Description: |
|---|
| Converts kilometers to miles. One mile equals exactly 1.609344 kilometers. |
| Comment: |
|---|
| The modern definition of the mile is based on the international yard, which was standardized in 1959. |