Miles to KM Converter
Convert miles to km instantly. Formula: kilometers = miles × 1.609344. Free, no ads walls, runs in your browser.
1 Mile (mi)
1.609344
Kilometer (km)
Kilometer (km) = Mile (mi) × 1.609344
1 Mile (mi) equals
Millimeter (mm)
1,609,344
Centimeter (cm)
160,934.4
Meter (m)
1,609.344
Kilometer (km)
1.609344
Inch (in)
63,360
Foot (ft)
5,280
Yard (yd)
1,760
Convert miles to km instantly with this free online converter — the units are already selected above, so just type your value and read the result. It's most often needed for converting race distances, flight ranges, and driving distances to metric.
The conversion uses the exact formula kilometers = miles × 1.609344. Quick reference: 1 mi = 1.61 km, 3.1 mi = 4.99 km, 13.1 mi = 21.08 km, 26.2 mi = 42.16 km. All math runs locally in your browser with 12-digit precision — nothing is sent to a server, and there's no sign-up or paywall.
How to convert units online
- 1Pick a category tab at the top — Length, Weight, Temperature, Volume, Area, Speed, or Data.
- 2Enter the number you want to convert in the Value field.
- 3Choose your starting unit in the From dropdown and your target unit in the To dropdown — the result updates instantly as you type.
- 4Click the swap button between the dropdowns to reverse the conversion direction.
- 5Check the formula shown under the result, and use the quick-reference grid below to see your value’s equivalent in every other unit of the category.
Frequently asked questions
What is the formula to convert miles to km?
kilometers = miles × 1.609344. The converter above applies it instantly as you type and shows the formula used under the result.
What are some common miles to km conversions?
1 mi = 1.61 km, 3.1 mi = 4.99 km, 13.1 mi = 21.08 km, 26.2 mi = 42.16 km
Can I convert km back to miles?
Yes — click the swap button between the two unit selectors to reverse the conversion direction instantly.
Is this converter accurate?
Yes. It uses exact international conversion factors and computes to 12 significant digits, entirely in your browser.
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