Convert kilometers to miles and miles to kilometers instantly. Bidirectional distance converter with formula and common values.
Multiply the kilometer value by 0.621371. The kilometer is part of the metric system, while the mile traces back to the Roman "mille passus" (a thousand paces). Today the international mile is defined as exactly 1,609.344 meters.
| Kilometers | Miles |
|---|---|
| 3 | 1.8641 |
| 5 | 3.1069 |
| 8 | 4.9710 |
| 21.1 | 13.1109 |
| 42.195 | 26.2188 |
| 100 | 62.1371 |
| 160 | 99.4194 |
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One kilometer equals approximately 0.621371 miles.
They are inverse operations. To go from km to miles, multiply by 0.621371. To go from miles to km, multiply by 1.60934.
A 5K (5 kilometers) is approximately 3.107 miles.
The US never fully adopted the metric system. Miles remain the legal standard for road signs and speed limits, rooted in the British Imperial system inherited during colonization.