About This Miles to Kilometers Converter
The mile (mi) is the standard unit for road distances and speed limits in the United States, United Kingdom, and a handful of other countries. The kilometer (km) is the metric equivalent used everywhere else. The conversion factor is exact: 1 mile = 1.609344 kilometers, making 1 km = 0.621371 miles. These two units appear side-by-side on road signs in border regions and on GPS devices that switch between systems.
This converter supports nine distance units including nautical miles for maritime and aviation use. Travelers driving across international borders, runners training for races listed in kilometers, cyclists comparing route distances, and pilots calculating flight distances all rely on this conversion regularly.
How to Use This Converter
- Enter the distance value in the Value field.
- Confirm Mile is selected in the From dropdown.
- Select Kilometer in the To dropdown (or any other target unit).
- The result and formula appear instantly below.
- Use Swap to convert kilometers back to miles, or Reset to clear all fields.
Units Covered
| Unit | Symbol | Common Use |
|---|---|---|
| Kilometer | km | Road distances and speed limits in metric countries |
| Mile | mi | Road distances and speed limits in US, UK, and select countries |
| Meter | m | Athletic track distances, structural and building measurements |
| Yard | yd | Short field distances, American football field lengths |
| Foot | ft | Human height, room dimensions, construction layouts |
| Nautical Mile | nmi | Aviation and maritime navigation distances |
Miles to Kilometers Conversion Table
| Miles [mi] | Kilometers [km] |
|---|---|
| 0.5 mi | 0.8047 km |
| 1 mi | 1.6093 km |
| 2 mi | 3.2187 km |
| 3 mi | 4.8280 km |
| 5 mi | 8.0467 km |
| 10 mi | 16.093 km |
| 13.1 mi | 21.082 km (half marathon) |
| 26.2 mi | 42.165 km (marathon) |
| 50 mi | 80.467 km |
| 100 mi | 160.93 km |
| 250 mi | 402.34 km |
| 500 mi | 804.67 km |
How to Convert Miles to Kilometers
To convert miles to kilometers, multiply by 1.60934:
Example: Convert 26.2 miles (marathon) to kilometers:
To convert kilometers back to miles, divide by 1.60934 (or multiply by 0.621371):
Example: Convert 100 km to miles:
When You Need to Convert Miles to Kilometers
Road trips between the US and Canada or Mexico are the most common trigger. Speed limits change from miles per hour to kilometers per hour at the border, and road signs show distances in km rather than miles. A 60 mph speed limit equals approximately 97 km/h. A 100-mile trip to a Canadian city is 161 km on a Canadian map app. Travelers, long-haul truckers, and anyone driving cross-border need this conversion to navigate road signs and plan fuel stops accurately.
Running and endurance sports mix units constantly. American race events use miles — a 5K is 3.107 miles, a 10K is 6.214 miles, a marathon is 26.2 miles. European training plans use kilometers. An American runner following a European coaching plan that prescribes "a 12 km long run" needs to know that equals 7.46 miles on their GPS watch. Cyclists, triathletes, and ultrarunners switching between US and international training resources face this conversion every week.
Aviation and shipping also use both units. Nautical miles are standard for marine navigation, but weather reports and flight plans in the US often quote distances in statute miles while international routes use kilometers. A captain converting a 500-mile voyage to kilometers for a metric-based chart, or a logistics coordinator quoting a trucking distance in both units for a cross-border invoice, uses this conversion as part of routine operations.