Convert miles to kilometers
Enter any value to calculate the result instantly.
miles to kilometers formula
Multiply miles by exactly 1.609344. A statute mile is defined as 5,280 international feet, producing the exact kilometer relationship.
Conversion table
Use these reference values for a quick comparison. The calculator above accepts positive, negative, decimal, and large values when they are meaningful for the quantity.
| miles | kilometers |
|---|---|
| 1 mi | 1.609344 km |
| 3.1 mi | 4.9889664 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 26.2 mi | 42.1648128 km |
| 100 mi | 160.9344 km |
How to use this converter
Enter the source measurement in the first field. CalUnit applies the displayed formula and updates the destination value immediately. You can use decimals and negative values, copy the result into your work, and compare it with the reference table. Keep the original unit beside the starting measurement so another reader can verify the calculation. For a different unit pair, open the complete length conversion guide or the multi-unit length converter.
When this conversion is useful
Use this conversion for land distances and road speeds. Marine and aviation distances often use nautical miles, which have a different definition.
Accuracy and rounding
The factor is exact. Rounded travel displays are convenient, but preserve more digits when the result will be reused in another calculation.
Standards references
CalUnit checks physical unit relationships against authoritative measurement references. See the NIST Guide to the SI conversion factors and the BIPM SI Brochure. Regional cooking measures and digital storage conventions are identified separately because their names can represent more than one definition.