Kilometers to Miles converter (km to mi)
Convert Kilometers (km) to Miles (mi) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert Kilometers to Miles
1 kilometer (km) is equal to 0.621371 miles (mi).
1 km = 0.621371 mi
The length L in miles (mi) is equal to the length L in kilometers (km) multiplied by 0.621371:
Example: Convert 10 km to miles:
L(mi) = 10 × 0.621371 = 6.214 mi
What is a Kilometers?
The kilometre (km) is 1,000 metres. Road distances outside the United States are almost always marked in kilometres.
What is a Miles?
The mile (mi) is 5,280 feet, or 1.609344 kilometres. US and UK road distances remain in miles.
This page converts length from Kilometers into Miles. One km equals 0.621371 mi.
Kilometers to Miles conversion table
Common km values and the matching mi result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Kilometers (km) | Miles (mi) |
|---|---|
| 0 km | 0 mi |
| 1 km | 0.621371 mi |
| 2 km | 1.242742 mi |
| 5 km | 3.106855 mi |
| 10 km | 6.21371 mi |
| 20 km | 12.42742 mi |
| 50 km | 31.06855 mi |
| 100 km | 62.1371 mi |
| 200 km | 124.2742 mi |
| 500 km | 310.6855 mi |
| 1000 km | 621.371 mi |
How this calculator works
The form on this page is a Kilometers-to-Miles converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the mi result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many mi are in 1 km?
1 km = 0.621371 mi.
How do I convert Kilometers to Miles?
The length L in miles (mi) is equal to the length L in kilometers (km) multiplied by 0.621371:
Is this km to mi converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.