KM to Miles Converter
Convert kilometers to miles for running, driving and travel. One kilometer is roughly 0.621371 miles — get the exact distance below.
How to convert km to miles
- Enter the distance in kilometers into the box above.
- The mile equivalent updates live as you type.
- Switch either dropdown to convert between any length unit on this site.
The formula
Miles are found by multiplying kilometers by 0.621371:
miles = kilometers × 0.621371
Reversed, kilometers = miles × 1.609344.
Common km to miles values
| Kilometers | Miles |
|---|---|
| 1 km | 0.6214 mi |
| 5 km | 3.1069 mi |
| 10 km | 6.2137 mi |
| 21.0975 km | 13.1094 mi |
| 42.195 km | 26.2188 mi |
| 100 km | 62.1371 mi |
Related tools
- Miles to KM converter — go the other way.
- Meters to Feet converter — for shorter distances.
Frequently asked questions
- How do I convert kilometers to miles?
- Multiply the kilometer value by 0.621371. For example, 10 km × 0.621371 ≈ 6.214 miles. The converter above shows the result live.
- How many miles are in a kilometer?
- One kilometer is about 0.621371 miles. The reverse factor — miles to km — is exactly 1.609344.
- What is a 5K race in miles?
- A 5 km race is about 3.107 miles (5 × 0.621371), which is why it’s often described as roughly "3.1 miles" by runners.
- What is a marathon (42.195 km) in miles?
- A marathon is 42.195 km, which converts to about 26.219 miles — the standard marathon distance runners quote as "26.2 miles".
- Why isn’t the km-to-miles factor a round number?
- The mile is defined as exactly 1609.344 meters, so its inverse (kilometers to miles) doesn’t simplify to a clean decimal — 0.621371 is itself a rounded value.
- Does this tool track or upload the distances I enter?
- No. Everything is computed locally in your browser with JavaScript — nothing is sent to a server.