mile to km Converter - Mile to Kilometer
Mile (mi) (mile) to Kilometer (km)
Direct answer
1 mile = 1.609344 km
km = mile × 1.609344
Converter
Conversion formula
km = mile × 1.609344
mile = km × 0.621371192237
Example: 10 mile = 10 × 1.609344 = 16.09344 km.
Common conversion table
| mile | km |
|---|---|
| 1 mile | 1.609344 km |
| 2 mile | 3.218688 km |
| 5 mile | 8.04672 km |
| 10 mile | 16.09344 km |
| 20 mile | 32.18688 km |
| 50 mile | 80.4672 km |
| 100 mile | 160.9344 km |
| 1,000 mile | 1,609.344 km |
Conversion derivation
Express both mile and km in the same base unit m (meter), then cancel the shared base unit.
- 1
Rewrite mile in the base unit
- 2
Rewrite km in the base unit
- 3
Forward conversion
- 4
Reverse conversion
AI explanation for this conversion
This pre-generated explanation is schema-checked. Numeric results still come from the page formula and calculator.
Why the Mile-to-Kilometer Conversion Factor Holds
The conversion factor of 1.609344 is derived directly from the international agreement that defines exactly one mile as 1,609.344 meters and exactly one kilometer as 1,000 meters. The factor is the precise ratio of these two definitions.
Definition
The conversion factor is the numerical value that, when multiplied by a quantity in miles, yields the equivalent quantity in kilometers.
Principle
By expressing both the mile and the kilometer in the same fundamental base unit (the meter), the shared unit cancels, leaving the direct numerical ratio between the two units.
Assumptions
- The mile is defined as exactly 1,609.344 meters.
- The kilometer is defined as exactly 1,000 meters.
- The meter is the common base unit for the conversion.
Cautions
- The conversion factor is exact by definition, but practical calculations may require rounding to a specified number of significant figures.
- The factor applies to the international mile and kilometer as standardly defined.
FAQ
How many km are in 1 mile?
1 mile = 1.609344 km.
How many km are in 10 mile?
10 mile = 16.09344 km.
How many km are in 100 mile?
100 mile = 160.9344 km.
What is the formula to convert mile to km?
Use km = mile × 1.609344.
How many mile are in 1 km?
1 km = 0.621371192237 mile.
What should I check when converting mile to km?
Use the conversion factor and round the result to the precision required by your calculation.