This kilometers to miles converter gives you the km to mi result instantly, in your browser, with the exact ratio so you can verify it. 1 kilometer is about 0.621371 miles, and going the other way, 1 mile is 1.60934 kilometers. Kilometers are part of the metric system used in most countries; miles are an imperial unit still common in the United States and the United Kingdom.
To convert by hand, multiply the number of kilometers by 0.621371. For example, 10 kilometers is 6.21371 miles and 100 kilometers is 62.1371 miles. The table below lists the most requested values, and the converter above accepts decimals for anything in between.
km to mi formula
mi = km × 0.621371
1 kilometer is about 0.621371 miles. Multiply the value in kilometers by that factor to get miles.
Kilometers to Miles conversion table
| kilometers | miles | Rounded |
|---|---|---|
| 1 km | 0.621371 mi | 0.621 |
| 2 km | 1.24274 mi | 1.24 |
| 3 km | 1.86411 mi | 1.86 |
| 4 km | 2.48548 mi | 2.49 |
| 5 km | 3.10686 mi | 3.11 |
| 6 km | 3.72823 mi | 3.73 |
| 7 km | 4.3496 mi | 4.35 |
| 8 km | 4.97097 mi | 4.97 |
| 9 km | 5.59234 mi | 5.59 |
| 10 km | 6.21371 mi | 6.21 |
| 12 km | 7.45645 mi | 7.46 |
| 15 km | 9.32057 mi | 9.32 |
| 20 km | 12.4274 mi | 12.4 |
| 25 km | 15.5343 mi | 15.5 |
| 30 km | 18.6411 mi | 18.6 |
| 40 km | 24.8548 mi | 24.9 |
| 50 km | 31.0686 mi | 31.1 |
| 60 km | 37.2823 mi | 37.3 |
| 70 km | 43.496 mi | 43.5 |
| 75 km | 46.6028 mi | 46.6 |
| 80 km | 49.7097 mi | 49.7 |
| 90 km | 55.9234 mi | 55.9 |
| 100 km | 62.1371 mi | 62.1 |
| 150 km | 93.2057 mi | 93.2 |
| 200 km | 124.274 mi | 124 |
| 250 km | 155.343 mi | 155 |
| 300 km | 186.411 mi | 186 |
| 500 km | 310.686 mi | 311 |
| 750 km | 466.028 mi | 466 |
| 1,000 km | 621.371 mi | 621 |
Frequently asked questions
How many miles are in 5 kilometers?
5 km = 3.10686 mi. Multiply 5 by 0.621371, the number of miles in one kilometer. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert kilometers to miles?
mi = km × 0.621371. The factor comes from the definitions of the units: 1 kilometer is about 0.621371 miles. Worked example: 12 km = 7.45645 mi.
Is 30 km the same as 18.6411 mi?
Yes. 30 km = 18.6411 mi. Rounded to four decimals it is 18.64 mi.
How do I convert miles back to kilometers?
Divide by 0.621371, or multiply by 1.60934: 1 mile is 1.60934 kilometers. The miles to kilometers page linked above lists common values the other way.
Is the km to mi conversion exact?
1 kilometer is about 0.621371 miles. The ratio is a defined constant but produces a long decimal, so this page rounds to six significant digits, which is more precision than any everyday measurement needs.