The mile is a imperial unit of distance used in road travel.
Miles to Kilometers
Convert miles (mi) to kilometers (km) instantly. Free online length converter with formulas, tables and examples.
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Convert metric, imperial, and nautical distance units.
Context values
Some unit families need one extra value for a physically accurate result.
The kilometer is a metric unit of length equal to 1,000 meters.
km = mi × 1.609344
Results update instantly for Miles to Kilometers conversions.
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Formula
km = mi × 1.609344
mi = km ÷ 1.609344
Conversion table
| 1 mi | 1.609344 km |
| 10 mi | 16.093440 km |
| 100 mi | 160.934400 km |
| 1000 mi | 1609.344000 km |
Related conversions
Step-by-step example
- Start with the value you want to convert: 26.2 mi.
- Apply the formula: km = 26.2 × 1.609344.
- Work out the calculation: 26.2 × 1.609344 = 42.16.
- Result: 26.2 mi is equal to 42.16 km.
Mile vs Kilometer
| Attribute | Mile | Kilometer |
|---|---|---|
| Symbol | mi | km |
| Category | Length | Length |
| System | US customary / Imperial | Metric / SI |
| Typically used for | The mile is a imperial unit of distance used in road travel. | The kilometer is a metric unit of length equal to 1,000 meters. |
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Frequently asked questions
How do you convert mile to kilometer?
Use the formula km = mi × 1.609344. One mile equals 1.609344 kilometers.
What is Mile?
The mile is a imperial unit of distance used in road travel.
What is Kilometer?
The kilometer is a metric unit of length equal to 1,000 meters.
Is the mile to kilometer conversion exact?
Yes. Mile and Kilometer are both defined against internationally agreed constants, so the conversion factor used here is exact -- any rounding you see comes only from the number of decimal places displayed, not from the relationship itself.
How do I convert kilometer back to mile?
Use the reverse formula mi = km ÷ 1.609344. This site's reverse converter does the same calculation automatically.
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About this conversion
This length converter turns mile into kilometer using the exact defined relationship between the two units, not an approximation. A 26.2-mile marathon route is about 42.16 km. The statute mile of 5,280 feet was set by English law in 1593, standardizing an older, less consistent Roman-derived unit. The kilometer, 1,000 meters, has been the standard unit for road and travel distances in most of the world since the metric system spread in the 19th century. Because both units are built on internationally standardized constants, the same mile-to-kilometer factor works whether you're doing a quick everyday estimate or a calculation that needs to be precise.