KM to Miles Converter

Convert kilometers to miles as you type. Type in either box, or switch to any other length unit.

LiveLengthmi = km ÷ 1.609344URL: /km-to-miles

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About kilometers and miles

Length units appear on building plans, maps, product dimensions, height and distance. The US uses inches, feet, yards and miles day to day; most other countries and all science use metres.

This converter changes kilometers (km) into miles (mi) instantly. You can also type in the second box to convert backwards, or pick any other length unit from the menus.

Formula

mi = km ÷ 1.609344 1 km = 0.621371192 mi 1 mi = 1.609344 km

Both units are defined in metres: 1 kilometer = 1,000 metre, and 1 mile = 1,609.344 metre. Dividing one by the other gives the factor above.

Worked example

To convert 12 km: 12 × 0.621371192 = 7.456454 mi.

Notes and assumptions

Results use exact defined factors and are rounded only for display (up to 6 significant digits, or the decimals you choose).

Popular searches

Number-specific searches can each have their own page that opens this converter pre-filled.

km to mileskm to mikm to mile1km to miles

Kilometers to miles conversion table

kmmi
1 km0.621371 mi
2 km1.242742 mi
3 km1.864114 mi
4 km2.485485 mi
5 km3.106856 mi
6 km3.728227 mi
7 km4.349598 mi
8 km4.97097 mi
9 km5.592341 mi
10 km6.213712 mi
12 km7.456454 mi
15 km9.320568 mi
20 km12.42742 mi
kmmi
25 km15.53428 mi
30 km18.64114 mi
40 km24.85485 mi
50 km31.06856 mi
60 km37.28227 mi
70 km43.49598 mi
75 km46.60284 mi
80 km49.7097 mi
90 km55.92341 mi
100 km62.13712 mi
250 km155.3428 mi
500 km310.6856 mi
1,000 km621.3712 mi

How to convert by hand

  1. Take the value in kilometers.
  2. Multiply it by 0.621371192.
  3. Round only at the end.

Common mistakes

  • Rounding the factor too early. 2.54 cm per inch is exact; don’t use 2.5.
  • Writing 5.5 feet as 5 ft 5 in. It’s 5 ft 6 in.

Sources

Frequently asked questions

How many miles are in one kilometer?

1 km = 0.621371 mi.

How do I convert kilometers to miles?

Multiply by 0.621371192 (or divide by 1.609344). Example: 10 km = 6.213712 mi.

How do I convert miles back to kilometers?

Divide by 0.621371192. Press the swap button in the converter.

About this tool

Written by
[Author: to be assigned]
Reviewed by
Formula tests passed · human review pending
Last updated
31 Oct 2026

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