How many kilometers is one mile?

Exactly 1.609344 km. The international mile is 5280 feet of 0.3048 m, which is 1609.344 meters.

Is a nautical mile the same as a mile?

No. A nautical mile is 1852 m (1.852 km), about 15% longer than a statute mile. Ships and aircraft use it; the full unit converter has both.

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Miles to KM

Miles to kilometers, exact to the meter.

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Exact NIST Factors

Miles to km

Convert miles to kilometers: multiply by 1.609344

From

1 mile = 1.609344 kilometers

Formula: km = mi × 1.609344

Decimals

Miles to kilometers table

Miles (mi)	Kilometers (km)
1	1.609344
2	3.218688
3	4.828032
4	6.437376
5	8.04672
6	9.656064
7	11.265408
8	12.874752
9	14.484096
10	16.09344
15	24.14016
20	32.18688
25	40.2336
50	80.4672
100	160.9344

Calculated on your device with exact factors from NIST and the SI.

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How to convert Miles to km

Three steps, all in your browser.

1
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Miles to KM: what to know

The mile is the distance unit on road signs in the United States and the UK, and for running and cycling in those countries. Converting miles to kilometers is a multiplication by 1.609344. The international mile is defined as exactly 1609.344 m (5280 feet of 0.3048 m), from the 1959 international yard and pound agreement, so the factor is exact.

Examples: a 3-mile run is 4.828 km; 26.2 miles is 42.165 km (the official marathon is 42.195 km, or 26.219 miles); a 250-mile road trip is 402.3 km. Speed works the same way, since a mile per hour is 1.609344 km/h: a 65 mph limit is 104.6 km/h.

Be careful with the nautical mile, which is defined as exactly 1852 m and is used at sea and in aviation. One nautical mile is 1.15078 statute miles. The miles on this page are statute (land) miles; the full unit converter has nautical miles too.

Popular uses

Converting US or UK road distances for metric maps
Translating running mileage to kilometers
Planning trips with a rental car abroad
Comparing car range or e-bike range figures

Tips for the best result

Quick estimate: miles × 1.6, or miles × 8 ÷ 5.
Keep three decimals when converting race distances; officials measure to the meter.
Fuel economy needs its own conversion: mpg is not a simple km factor.
Mile markers on US highways count miles, so exits are easy to estimate once you know the factor.

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