Length / mi → km
Convert Miles to Kilometers
Compare road distances and running routes across measurement systems. This converter uses the international statute mile, not the nautical mile.
Reverse: Kilometers to Miles →
How to convert miles to kilometers
Length conversion changes the unit of a distance. Area and volume need squared and cubed factors; this calculator does not convert square feet or cubic feet.
Use x for the value in mi, b for the intermediate value in m, and y for the result in km.
km = mi × 1609.344 ÷ 1000
Worked examples
5 mi ≈ 8.04672 km
Step 1: (5 × 1609.344) ≈ 8046.72 m.
Step 2: 8046.72 ÷ 1000 ≈ 8.04672 km.10 mi ≈ 16.09344 km
Step 1: (10 × 1609.344) ≈ 16093.44 m.
Step 2: 16093.44 ÷ 1000 ≈ 16.09344 km.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Miles
This calculator uses the international statute mile, exactly 1,609.344 meters. A nautical mile and a historical survey mile are different units.
About Kilometers
A kilometer is 1,000 meters. It is useful for road distances and routes; it measures distance rather than speed.
Definitions and sources
Use consistent length units when carrying dimensions into construction calculations.
Miles to kilometers reference table
| Miles (mi) | Kilometers (km) |
|---|---|
| 1 | 1.609344 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 100 | 160.9344 |
| 1000 | 1609.344 |
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