Kilometers to Miles

Convert km to miles instantly — exact factor, works in both directions.

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Exact formula: 1 km = 0.621371 miles

📋 Quick Conversion Table

Kilometers (km)Miles (mi)
1 km0.621371 mi
5 km3.10686 mi
10 km6.21371 mi
25 km15.5343 mi
50 km31.0686 mi
100 km62.1371 mi

🔁 How to Use This Converter

  1. 1.Type in either box. Enter kilometers in the top box or miles in the bottom box — the other side updates as you type.
  2. 2.Use the swap button. One tap flips the direction, so the same page converts miles back to kilometers.
  3. 3.Trust the exact factor. Every result uses 1 km = 0.621371192 miles — the exact international definition, not a rounded shortcut.
  4. 4.Check the quick table. Common road and running distances (5K, 10K, marathon training) are pre-calculated below the converter.

❓ FAQ

How many miles is 10 km?

10 kilometers equals 6.21371 miles. A 10K run is therefore a little over 6.2 miles.

How do I convert kilometers to miles?

Multiply the kilometers by 0.621371. For a rough mental estimate, multiply by 5 and divide by 8 — 10 km becomes about 6.25 miles, close to the exact 6.21.

Is a kilometer longer than a mile?

No. One mile equals 1.60934 kilometers, so a mile is about 61% longer than a kilometer.

Is this kilometers to miles converter free?

Yes — 100% free, no sign-up. Conversions happen in your browser; nothing is uploaded, saved or tracked.

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