Miles to Kilometers
Convert miles to kilometers instantly. 1 mi = 1.609344 km. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert miles to kilometers
To convert miles to kilometers, multiply by 1.609344. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
km = mi × 1.609344
Miles to Kilometers conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Miles | Kilometers |
|---|---|
| 1 mi | 1.609344 km |
| 2 mi | 3.218688 km |
| 3 mi | 4.828032 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 20 mi | 32.18688 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
| 500 mi | 804.672 km |
| 1,000 mi | 1,609.34 km |
What is a mile?
1,760 yards. The statute mile used on US and UK roads.
What is a kilometer?
A thousand metres. The standard road-distance unit almost everywhere except the US and UK.
The formula
km = mi × 1.609344
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Miles to Kilometers
- Type the number of miles you want to convert.
- Read the result in kilometers straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked kilometers to miles page.
Miles to Kilometers — frequently asked questions
How many kilometers are in a mile?
One mile equals 1.609344 km. km = mi × 1.609344
What is the formula to convert miles to kilometers?
The formula is km = mi × 1.609344. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert kilometers back to miles?
Divide instead of multiplying: one kilometer is 0.6213711922 mi. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this miles to kilometers free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error