miles to km
Unit Converters

miles to km

Convert miles to kilometers (or kilometers to miles) instantly. Type a value in either field and the other updates live; use the swap button to flip the direction.

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How It Works

One mile is exactly 1.609344 kilometers, so to convert miles to kilometers you multiply the number of miles by 1.609344. To go the other way, divide kilometers by 1.609344.

Frequently Asked Questions

How do I convert miles to kilometers?
Multiply the number of miles by 1.609344, since one mile is exactly 1.609344 kilometers.
What is a nautical mile and is it the same as a regular mile?
A nautical mile is exactly 1,852 meters (about 1.15078 regular miles). It is used in aviation and maritime navigation, while the ordinary mile is used on land.
How accurate is the 1.609344 factor?
It is exact by definition. The international mile was standardized in 1959 as exactly 1,609.344 millimeters, so the conversion has no rounding error.

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