Convert kilometers to miles
Converting kilometers to miles is a common length task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 km equals 0.621371 mi, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert kilometers to miles
To convert kilometers to miles, multiply the number of kilometers by 0.621371. For example, 10 km × 0.621371 = 6.21371 mi.
mi = km × 0.621371
- Write down the value in kilometers you want to convert.
- Multiply it by 0.621371 (the exact km→mi factor).
- The result is your value in miles. Check it below with the converter or the table.
Conversion table
Common values of kilometers and their equivalents in miles:
| km | mi |
|---|---|
| 1 | 0.621371 |
| 2 | 1.24274 |
| 3 | 1.86411 |
| 4 | 2.48548 |
| 5 | 3.10686 |
| 10 | 6.21371 |
| 20 | 12.4274 |
| 25 | 15.5343 |
| 50 | 31.0686 |
| 100 | 62.1371 |
| 250 | 155.343 |
| 500 | 310.686 |
About these units
Kilometer (km). A kilometer equals 1,000 meters and is the standard metric unit for road distances and geography. One kilometer is about 0.62 miles or a 12-minute walk.
Mile (mi). The international mile is defined as exactly 1,609.344 meters, or 5,280 feet. It is the standard road distance unit in the United States and the United Kingdom.
Frequently asked questions
How do I convert kilometers to miles?
To convert kilometers to miles, multiply the number of kilometers by 0.621371. For example, 10 km × 0.621371 = 6.21371 mi. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many miles are in 1 kilometer?
1 km = 0.621371 mi. That is the fixed relationship used by this converter and by international standards.
How many kilometers are in 1 mile?
1 mi = 1.60934 km. If you are converting in the opposite direction, use our Mile to Kilometer converter for the dedicated table and FAQ.
Is the kilometers to miles conversion exact?
Yes. Both units are defined by international agreement, so the factor of 0.621371 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is kilometer used for?
A kilometer equals 1,000 meters and is the standard metric unit for road distances and geography. One kilometer is about 0.62 miles or a 12-minute walk.