Five-mile run
5 multiplied by 1.609344 = 8.04672 km. The tool displays 8.0467 km; rounded to two decimal places, that is 8.05 km. Round only the final answer when adding several route segments.
Use Miles to Kilometres
Converts miles to kilometres in this tab, with nothing sent anywhere.
Runs entirely on your deviceThe conversion happens in this browser tab. Nothing you type is uploaded, logged or stored, which is worth knowing for anything you would not paste into a search box.
The rounded 26.2-mile description of a marathon converts to about 42.165 km. The official marathon distance is 42.195 km, so start from that official value when checking race certification rather than converting the shorthand.
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Browse all general convertersAbout Miles to Kilometres
Use this converter for road distances, odometer readings and running routes measured in international miles. Multiply miles by 1.609344 to obtain kilometres; divide kilometres by the same factor for the reverse calculation. The international mile is exactly 1,609.344 metres. The factor is exact, but a measured route or rounded mileage is not necessarily exact. Results here are rounded to four decimal places, so keep the original distance when repeating a calculation. This page converts distance, not travel time, running pace or fuel consumption. A map distance and a vehicle's advertised range can be expressed in the same units without implying that the vehicle will achieve that range on a particular journey.
Using Miles to Kilometres
- Type a number of mi. You can paste a value with its unit; the tool reads the number.
- The exact factor is applied and the result is shown as km, updating live as you type.
- Copy the answer, or switch to the reverse converter to go from km back to mi.
Where miles to kilometres helps
Common road distances
10 miles = 16.09344 km; 50 miles = 80.4672 km; 100 miles = 160.9344 km. Multiplying by 1.6 is a useful mental estimate, but at 100 miles it understates the exact distance by 0.9344 km.
Before you use the result
- The result is rounded for readability, so a value converted and then converted back may differ in the last decimal place. The underlying factor is exact.
- Units in your input are ignored - only the first number is read - so entering 5 km here still means five miles. Enter one distance, not a list or sum.
- Nautical miles use a different factor: one nautical mile is 1.852 km. This page uses international miles, not marine or aviation nautical miles.
Questions about Miles to Kilometres
How many km in a mile?
One international mile is exactly 1.609344 kilometres. Multiply the number of miles by this factor; divide by it to convert kilometres back to miles.
Is my data uploaded?
No. Miles to Kilometres does the arithmetic in this browser tab; the value is calculated on your device and is not sent to a server.
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Kilometres to Miles
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