Convert Kilometers to Miles
Kilometers to Miles conversion table
| Kilometers (km) | Miles (mi) |
|---|---|
| 1 km | 0.621371 mi |
| 2 km | 1.242742 mi |
| 5 km | 3.106856 mi |
| 10 km | 6.213712 mi |
| 25 km | 15.53428 mi |
| 50 km | 31.06856 mi |
| 100 km | 62.137119 mi |
| 200 km | 124.274238 mi |
| 500 km | 310.685596 mi |
| 1000 km | 621.371192 mi |
How to convert kilometers to miles
Kilometers and miles are the two most common units for measuring long distances on land. A kilometer is part of the metric system and equals exactly 1,000 meters, while a mile is an imperial unit defined as 5,280 feet (about 1,609 meters). Road signs in most countries display distances in kilometers, but the United States, United Kingdom, and a handful of other nations still use miles.
To convert kilometers to miles, multiply the kilometer value by 0.621371. The formula is: miles = km × 0.621371. For example, a 10 km run equals 10 × 0.621371 = 6.214 miles. A marathon distance of 42.195 km converts to roughly 26.2 miles, which is why marathon races are often described that way in the US.
This conversion is essential for international travelers reading GPS directions, runners comparing race distances, and anyone interpreting vehicle odometer readings across borders. The factor 0.621371 comes from the exact definition that 1 mile = 1.609344 km.
For quick mental math, remember that 5 km is approximately 3.1 miles and 100 km is about 62 miles. Dividing kilometers by 1.6 also gives a close estimate when precision is not critical.
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Frequently asked questions
One kilometer equals approximately 0.621371 miles. Conversely, 1 mile is about 1.60934 kilometers.
The US retained imperial units including miles after independence, while most of the world adopted the metric system during the 19th and 20th centuries. Road infrastructure and cultural habit keep miles in use in several English-speaking countries.
No. A mile is longer — 1 mile equals about 1.609 kilometers, so a mile is roughly 60% longer than a kilometer.