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Km to Miles Converter

Convert kilometers to miles instantly. Free online converter with distance references, formula, and 100% client-side processing.

100% client-side. Your data never leaves your browser.

0.62137119
1 Kilometer = 0.62137119 Miles

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Convert Kilometers to Miles

Enter a distance in kilometers to convert it to miles. The conversion factor is approximately 0.621. Kilometers are part of the metric system used worldwide. Miles are used in the US and UK for road distances.

Common Distance References

KilometersMilesDescription
1 km0.62 miStandard conversion
5 km3.11 mi5K race
10 km6.21 mi10K race
21.1 km13.1 miHalf marathon
42.2 km26.2 miMarathon
100 km62.1 miUltra-marathon

How to Use

  1. The tool opens with 1 km selected
  2. Type any kilometer value in the left input
  3. Read the mile result on the right
  4. Click the swap button to convert miles to kilometers

For more conversions, see the full Unit Converter or try Miles to Km.