kilometers to miles Converter
Type a value in kilometers and get the answer in miles instantly — or convert the other way. The conversion uses the exact relationship 1 kilometers = 0.621371 miles, the same formula used in textbooks and engineering references.
Convert kilometers to miles for road trips, running distances and speed limits. One kilometer is exactly 1/1.609344 miles ≈ 0.6214 miles.
How to use
- Type your value into the kilometers box — the miles result updates as you type.
- To go the other direction, type into the miles box instead and read the kilometers result.
- Copy the result with one tap, or scan the reference table below for common values.
Frequently asked questions
How do you convert kilometers to miles?
Multiply the number of kilometers by 0.621371. For example, 10 kilometers = 6.21371 miles. The converter above does this for you and shows more decimal places than you will ever need.
How many miles are in one kilometers?
Exactly 0.621371 miles. This is a fixed definition, not an approximation, so the conversion is exact at any scale.
Is this converter accurate for professional use?
Yes — it uses full double-precision arithmetic and the official kilometers-to-miles factor, so results are reliable for schoolwork, cooking, fitness, travel and technical work.
Can I convert miles back to kilometers?
Yes. The converter is two-way: just type in the second box and the first box updates instantly with the reverse conversion.