Miles to Km Converter
Convert miles to kilometers or kilometers back to miles. Useful for road trips, maps, running distances, cycling routes, and international distance comparisons.
Miles to Km Converter tool
Reference: 1 mile = 1.609344 km. Use Swap to reverse the direction.
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How miles to kilometers conversion works
Miles and kilometers are both distance units. Miles are commonly used in the United States and the United Kingdom, while kilometers are used in most metric contexts.
- Miles to kilometers: kilometers = miles × 1.609344
- Kilometers to miles: miles = kilometers ÷ 1.609344
- Rounding note: travel and route planning usually only need 1–3 decimals, while technical comparisons may need more
For common running distances, 5 km is about 3.1 miles, 10 km is about 6.2 miles, and a marathon is about 26.2 miles or 42.195 km.
Examples
- 1 mi → 1.609 km
- 3.1 mi → 4.989 km — close to a 5K distance
- 6.2 mi → 9.978 km — close to a 10K distance
- 26.2 mi → 42.195 km — marathon distance reference
FAQ
- What is the miles to km formula?
The formula is kilometers = miles × 1.609344. The relationship 1 mile = 1.609344 kilometers is exact.
- Is this conversion exact?
The base conversion factor is exact, but displayed results may be rounded depending on the rounding option you choose.
- Can I convert kilometers to miles here?
Yes. Use the direction selector or the Swap button to convert kilometers back to miles.
- Why are race distances like 5K and marathon shown here?
Miles and kilometers are often compared for running, cycling, travel, and mapping. Common race distances are useful reference points.
- Does this converter store my distance input?
No. The conversion runs locally in your browser and your input is not sent to a server.