🛣️ Miles to Km Converter
Convert miles to kilometers instantly, both directions.
About this tool
Converts miles to kilometers using the exact factor 1 mile = 1.609344 km.
Handy for road-trip distances, race lengths, and reading a car's speedometer or a foreign road sign in the unit you don't normally think in.
Worked example
A 26.2-mile marathon is about 42.2 km, and a 100 km bike route is about 62.1 miles.
How to use it
- Enter a distance in miles.
- The kilometer equivalent appears instantly.
- Swap direction to convert kilometers back to miles.
Tips
- A fast mental estimate: multiply miles by 1.6, or kilometers by 0.6.
- US and UK road signs use miles; most of the rest of the world uses kilometers.
- Pair this with the Pace Calculator if you're converting a race distance before working out your target pace.
FAQ
How many km is 1 mile exactly?
Exactly 1.609344 km.
Why do some countries still use miles?
The US, UK, and a handful of other countries kept the imperial mile for road distances even after officially adopting metric units elsewhere.
Is a 5K the same as 5 miles?
No — a 5K race is 5 kilometers, about 3.1 miles, roughly 38% shorter than a 5-mile race.
From the blog: getting the most out of this tool
Runners, drivers, and cyclists are the three groups who search this conversion most, so the page is built to answer in one glance — no unit dropdown to hunt through first.
If you regularly convert race splits or pace, our dedicated Pace Calculator uses the same distance math and can take the output straight from here.
📖 Want the fuller explanation?
See Metric vs Imperial Units for the reasoning behind this calculation, with worked examples.