Miles to Kilometers Converter
Convert miles to kilometers in one step. Enter a distance in miles and the tool returns kilometers, based on the exact definition that one mile is 1.609344 kilometers. It is useful for reading road signs and race distances abroad, comparing car odometers, and planning runs or drives across countries that use the metric system.
Calculate
Default result: 8.0467 km
Miles to Kilometers Converter · Result
calculators.dev
Kilometers
5 mi
Reviewed by the calculators.dev team · Last updated 2026-06-23
How to calculate
Type the distance in miles and read the kilometers below. To convert by hand, multiply miles by 1.609 — a 26.2-mile marathon is about 42.2 km. To go from kilometers back to miles, divide by 1.609 (or multiply by about 0.6214). The result updates live, so you can compare several distances quickly.
kilometers = miles × 1.609344, where 1.609344 is the exact number of kilometers in one mile (1 mile = 1609.344 meters). Equivalently, miles = kilometers ÷ 1.609344.
Example calculation
5 miles multiplied by 1.609344 kilometers per mile is 8.04672 kilometers. One mile is defined as exactly 1609.344 meters, which is 1.609344 kilometers, so distances scale by that fixed ratio.
- result
- 8.04672 km
Assumptions
- One international mile is defined as exactly 1609.344 meters, so the factor 1.609344 km per mile is exact.
- This is the statute (land) mile used on roads, not the nautical mile, which is longer and used at sea and in aviation.
- Displayed kilometers are rounded for readability; the underlying value keeps full precision.
Common mistakes
- Using 1.6 as the factor for precise work — it is close but understates kilometers by about half a percent.
- Confusing the statute mile with the nautical mile (1.852 km); use this converter only for land distances.
- Reversing the direction: multiply by 1.609 for kilometers, divide by 1.609 for miles.
Frequently asked questions
How many kilometers is 1 mile?
One mile is exactly 1.609344 kilometers, a little over one and a half kilometers.
What is 5 miles in kilometers?
5 miles is 8.04672 kilometers (5 × 1.609344), close to 8 km.
How long is a marathon in kilometers?
A marathon is 26.2 miles, which is about 42.2 kilometers (26.2 × 1.609344).
Is a mile the same as a nautical mile?
No. A statute mile is 1.609 km and is used on roads; a nautical mile is 1.852 km and is used in shipping and aviation. This converter uses the statute mile.