The standard factor
One international mile is exactly 1.609344 kilometers.
Examples
1 mile is 1.609344 km. 5 miles is 8.04672 km. 10 miles is 16.09344 km.
Miles to Kilometers Formula
One international mile equals exactly 1.609344 kilometers.
Reverse Conversion
To convert kilometers to international miles, divide the kilometer value by 1.609344.
Worked Examples
- 1 mile = 1.609344 km.
- 5 miles = 8.04672 km.
- 10 miles = 16.09344 km.
- 50 miles = 80.4672 km.
Distance vs Speed
A mile-to-kilometer conversion changes distance. If the original value is a speed such as miles per hour, use a speed conversion instead and keep the time unit unchanged.
International Mile
The factor above uses the international mile definition. Historical or specialized units should be identified separately rather than mixed with the international mile.
Use the Tervilo Length Converter
Use the Tervilo Length Converter for miles, kilometers and other common distance units.
The Miles-to-Kilometers Formula
One international mile equals exactly 1.609344 kilometers. The standard conversion is:
For a quick estimate, multiplying miles by about 1.6 gives a useful approximation. Use the full conversion factor when greater precision is required.
Worked Examples
| Miles | Calculated Kilometers | Rounded Result |
|---|---|---|
| 1 mile | 1.609344 km | 1.61 km |
| 5 miles | 8.04672 km | 8.05 km |
| 10 miles | 16.09344 km | 16.09 km |
| 26.2 miles | 42.1648128 km | 42.16 km |
Converting Kilometers Back to Miles
For the reverse conversion, divide the kilometer value by 1.609344.
Rounding and Precision
For travel and everyday distance comparisons, one or two decimal places are usually sufficient. Technical calculations may require more precision. Complete the conversion before rounding the final result.
Common Miles-to-Kilometers Mistakes
- Using the reverse conversion factor in the wrong direction.
- Confusing miles with nautical miles.
- Rounding the conversion factor before completing a calculation.
- Mixing miles and kilometers in the same distance calculation.
Practical Uses
Miles-to-kilometers conversion is useful for travel distances, road signs, running and cycling distances, maps, vehicle information and international product specifications.
Use the Tervilo Miles-to-Kilometers Converter
Enter the distance in miles and use the Tervilo converter when you need a quick conversion. Retain additional precision when the result will be used in another calculation.