How to convert miles to km
- 1 Type a value in the miles box; the kilometres appear as you type.
- 2 Or type in the kilometres box to convert the other way.
- 3 Use the conversion table below for common values, or copy the result.
Miles on the road
UK and US road signs, speed limits and car odometers use miles. The same factor of 1.609 converts miles per hour to kilometres per hour, so a 70 mph limit is about 113 km/h.
Working out fuel for a trip? US fuel is sold by the gallon; use Gallons to Liters. Converting back from kilometres? Use KM to Miles.
- Car odometers in miles can be converted for import paperwork by multiplying by 1.609.
- Running watches let you choose the unit, so convert your goal pace before a race.
- Flight distances use nautical miles, which are longer; do not use this converter for them.
Features
Exact factor
1 mile = 1.609344 km by definition.
Running distances
Half and full marathon distances are in the chart.
Two-way
Type kilometres to get miles.
When to use it
Driving in the UK or US
Speed limits and signs are in miles; 70 mph is 112.7 km/h. Planning fuel for the trip? Use the Liters to Gallons converter.
Running
A 5 km race is 3.1 miles; 26.2 miles is 42.2 km. Converting the other way? Use KM to Miles.
Car mileage
A used car with 60,000 miles has done about 96,560 km.
Flights and travel guides
Travel guides from the US and UK often give distances in miles; a 300 mile drive is 483 km, about five hours on a motorway.
Related Unit tasks
Frequently asked questions
How do I convert miles to km?
Multiply miles by 1.609344. 10 miles × 1.609344 = 16.09 km.
How many km is 1 mile?
1 mile is 1.609 km.
Is there a quick way to estimate?
Multiply by 8 and divide by 5. 50 miles × 8 ÷ 5 = 80 km; the exact answer is 80.47 km.
How many km is a marathon?
26.2 miles, or 42.195 km exactly.
How do I convert mph to km/h?
Use the same factor: multiply mph by 1.609344. 60 mph is 96.6 km/h.
What is a nautical mile?
A unit for sea and air navigation equal to 1,852 m, or 1.852 km, about 15% longer than a land mile.
Which countries use miles?
The US, the UK and a few smaller countries still use miles on road signs; most of the world uses kilometres.
How many km is 100 miles?
100 miles is 160.93 km.
How many km is 3 miles?
3 miles is 4.83 km, a little under a 5K run.
How do I convert miles per gallon to km per litre?
Multiply US mpg by 0.425 to get km per litre. 30 mpg is about 12.75 km per litre. UK mpg uses a larger gallon, so multiply by 0.354.
Why did Britain keep miles?
Road signs were never converted when the United Kingdom went metric in other areas, partly because replacing every sign would be expensive. Speed limits and distances therefore stay in miles.
Can I convert running pace?
Yes. A pace per mile divided by 1.609 gives the pace per kilometre. Running apps show both, so choose the unit your training plan uses.
Does Google Maps use miles or kilometres?
It follows the country and your settings. You can change the distance unit in the app settings, but this converter helps when a printed map, sign or guidebook uses the other unit.
Why do some countries use both units?
Countries that changed to the metric system later, such as Canada, still have older maps, people and businesses that think in miles. Converting both ways keeps travel plans clear for everyone on the trip.
Built and reviewed by Hamza Farooq, founder and lead developer
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