Convert Miles to Kilometers
1 mile (mi) equals 1.609344 kilometers (km).
1 mi = 1.609344 km
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk mile to kilometer converter to paste a column from Excel.
How to Convert Mile to Kilometer
- 1 mi = 1.609344 km
- 1 km = 0.6213711922 mi
- Example: convert 15 mi to km: 15 mi = 15 × 1.609344 km = 24.14016 km
Reference conditions. mi: The international yard and pound agreement (1959) fixed 1 yard = 0.9144 m exactly, so the inch, foot and mile are exact.
Formula
km = mi × 1.609344
Derivation from SI units:
- 1 mi = 5280 ft = 5280 × 0.3048 m = 1609.344 m
- 1 km = 10³ m
- 1 mi = 1609.344 m ÷ 1000 m per km = 1.609344 km
Both units are defined exactly, so the factor is exact. Mile definition: mile; Kilometer definition: kilometer.
Worked examples
- A marathon of 26.2 mi is 42.1648128 km.
26.2 mi × 1.609344 = 42.1648128 km - A speed of 60 mi per hour is 96.56064 km per hour.
60 mi × 1.609344 = 96.56064 km
Mile to Kilometer conversion table
| Miles (mi) | Kilometers (km) |
|---|---|
| 0.1 mi | 0.1609344 km |
| 0.25 mi | 0.402336 km |
| 0.5 mi | 0.804672 km |
| 1 mi | 1.609344 km |
| 2 mi | 3.218688 km |
| 3 mi | 4.828032 km |
| 3.1 mi | 4.9889664 km |
| 5 mi | 8.04672 km |
| 6.2 mi | 9.9779328 km |
| 10 mi | 16.09344 km |
| 13.1 mi | 21.0824064 km |
| 20 mi | 32.18688 km |
| 26.2 mi | 42.1648128 km |
| 50 mi | 80.4672 km |
| 60 mi | 96.56064 km |
| 100 mi | 160.9344 km |
| 200 mi | 321.8688 km |
| 500 mi | 804.672 km |
| 1000 mi | 1609.344 km |
Where it's used
Distances and speeds in miles are converted to kilometres for travel abroad, fitness apps and international reports. Multiply by exactly 1.609344.
Mile to other length units
| Conversion | 1 mi equals |
|---|---|
| mile to meter | 1609.344 m |
| mile to kilometer | 1.609344 km |
| mile to centimeter | 160934.4 cm |
| mile to millimeter | 1609344 mm |
| mile to micrometer | 1609344000 µm |
| mile to nanometer | 1609344000000 nm |
| mile to angstrom | 16093440000000 Å |
| mile to yard | 1760 yd |
| mile to foot | 5280 ft |
| mile to inch | 63360 in |
| mile to mil | 63360000 mil |
| mile to nautical mile | 0.8689762419 nmi |
Frequently asked questions
Is a mile 1.6 km?
Close: 1 mi = 1.609344 km exactly. Using 1.6 gives an error of about 0.6 %.
How many kilometers are in 1 mile?
1 mi = 1.609344 km.
How do I convert miles to kilometers?
Multiply the value in mi by 1.609344. For example, 15 mi × 1.609344 = 24.14016 km.
Is the mi to km conversion exact?
Yes. Both units are defined exactly, and 1 mi is exactly 1.609344 km.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "mile (based on the international foot)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Miles to Kilometers. Retrieved October 17, 2026, from https://scientificconverters.com/length/miles-to-kilometers/
IEEE
Scientific Converters, "Convert Miles to Kilometers," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/length/miles-to-kilometers/