length conversion
Convert Kilometers to Miles
One kilometer equals 0.62137 miles. Enter any value below for an exact conversion.
How to convert Kilometers to Miles
- Type the number of kilometers into the first field.
- The equivalent in miles appears immediately.
- Swap the units to convert in the opposite direction.
Kilometers to Miles formula
mi = km × 0.62137
Worked example: to convert 12 km, multiply 12 × 0.62137 = 7.4565 mi.
This conversion factor is exact by international definition rather than measured, so the only rounding is whatever you apply to the final answer.
Kilometers to Miles conversion table
| Kilometers | Miles |
|---|---|
| 1 km | 0.62137 mi |
| 2 km | 1.2427 mi |
| 5 km | 3.1069 mi |
| 10 km | 6.2137 mi |
| 25 km | 15.5343 mi |
| 50 km | 31.0686 mi |
| 100 km | 62.1371 mi |
What is a kilometer?
One thousand meters. Road distances are in kilometers everywhere except the United States, the United Kingdom and a handful of others.
What is a mile?
Exactly 1,609.344 meters, derived from the Roman mille passus of a thousand paces. Used for road distance in the US and the UK.
Frequently asked questions
How many miles are in a kilometer?
One kilometer is 0.62137 miles.
How do I convert kilometers to miles in my head?
Multiply by 6 and drop a digit. 100 km → 600 → 60 mi, against an exact 62.14. For more accuracy, use the Fibonacci trick: consecutive Fibonacci numbers are almost exactly km/mi pairs — 8 km ≈ 5 mi, 13 km ≈ 8 mi.
Is the conversion exact?
Yes. Both units are defined in terms of each other by international agreement, so the factor 0.62137 is exact rather than approximate.
How many kilometers is 100 mi?
100 mi is 160.93 km.
Which countries use miles?
The United States, the United Kingdom, and a small number of others including Liberia and Myanmar. Everywhere else signs distance in kilometers.
Is my data uploaded to convert it?
No. The arithmetic runs in your browser. Nothing is sent anywhere.