This miles to kilometers converter gives you the mi to km result instantly, in your browser, with the exact ratio so you can verify it. 1 mile is about 1.60934 kilometers, and going the other way, 1 kilometer is 0.621371 miles. Miles are an imperial unit still common in the United States and the United Kingdom; kilometers are part of the metric system used in most countries.
To convert by hand, multiply the number of miles by 1.60934. For example, 10 miles is 16.0934 kilometers and 100 miles is 160.934 kilometers. The table below lists the most requested values, and the converter above accepts decimals for anything in between.
mi to km formula
km = mi × 1.60934
1 mile is about 1.60934 kilometers. Multiply the value in miles by that factor to get kilometers.
Miles to Kilometers conversion table
| miles | kilometers | Rounded |
|---|---|---|
| 1 mi | 1.60934 km | 1.61 |
| 2 mi | 3.21869 km | 3.22 |
| 3 mi | 4.82803 km | 4.83 |
| 4 mi | 6.43738 km | 6.44 |
| 5 mi | 8.04672 km | 8.05 |
| 6 mi | 9.65606 km | 9.66 |
| 7 mi | 11.2654 km | 11.3 |
| 8 mi | 12.8748 km | 12.9 |
| 9 mi | 14.4841 km | 14.5 |
| 10 mi | 16.0934 km | 16.1 |
| 12 mi | 19.3121 km | 19.3 |
| 15 mi | 24.1402 km | 24.1 |
| 20 mi | 32.1869 km | 32.2 |
| 25 mi | 40.2336 km | 40.2 |
| 30 mi | 48.2803 km | 48.3 |
| 40 mi | 64.3738 km | 64.4 |
| 50 mi | 80.4672 km | 80.5 |
| 60 mi | 96.5606 km | 96.6 |
| 70 mi | 112.654 km | 113 |
| 75 mi | 120.701 km | 121 |
| 80 mi | 128.748 km | 129 |
| 90 mi | 144.841 km | 145 |
| 100 mi | 160.934 km | 161 |
| 150 mi | 241.402 km | 241 |
| 200 mi | 321.869 km | 322 |
| 250 mi | 402.336 km | 402 |
| 300 mi | 482.803 km | 483 |
| 500 mi | 804.672 km | 805 |
| 750 mi | 1,207.01 km | 1,207 |
| 1,000 mi | 1,609.34 km | 1,609 |
Frequently asked questions
How many kilometers are in 5 miles?
5 mi = 8.04672 km. Multiply 5 by 1.60934, the number of kilometers in one mile. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert miles to kilometers?
km = mi × 1.60934. The factor comes from the definitions of the units: 1 mile is about 1.60934 kilometers. Worked example: 12 mi = 19.3121 km.
Is 30 mi the same as 48.2803 km?
Yes. 30 mi = 48.2803 km. Rounded to four decimals it is 48.28 km.
How do I convert kilometers back to miles?
Divide by 1.60934, or multiply by 0.621371: 1 kilometer is 0.621371 miles. The kilometers to miles page linked above lists common values the other way.
Is the mi to km conversion exact?
1 mile is about 1.60934 kilometers. 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.