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Km to Miles Converter.

Convert kilometers to miles, with a table from 1 km to 500 km.

Use this km to miles converter to turn kilometers into miles: multiply by 0.621371, so 100 km is 62.14 miles and 10 km is 6.21 miles. It works the other way too, since 1 mile is exactly 1.609344 km. The tables below cover distances from 1 to 1,000 km.

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INTERACTIVE TOOL

01 / Enter values

Your result

62.13712 mi

1 km = 0.621371 mi

Common conversions

1 km → 0.62137 mi
5 km → 3.10686 mi
10 km → 6.21371 mi
50 km → 31.06856 mi
100 km → 62.13712 mi

QUICK ANSWER

To convert kilometers to miles, multiply the kilometers by 0.621371. So 100 km = 62.1371 miles, 50 km = 31.0686 miles and 500 km = 310.686 miles. To go the other way, multiply miles by 1.609344: 5 miles = 8.04672 km.

THE METHOD

How it works

Convert the source measurement to meters, then divide by the target unit’s value in meters. Exact definitions include 1 inch = 0.0254 meters and 1 mile = 1,609.344 meters.

PUT IT TO USE

Example calculation

10 km = 6.213712 mi. Change the amount or swap the units above to calculate your own value.

QUICK REFERENCE

Conversion tables

Kilometers to miles conversion table
kmmi
1 km0.621 mi
2 km1.243 mi
3 km1.864 mi
5 km3.107 mi
10 km6.214 mi
15 km9.321 mi
20 km12.427 mi
21.0975 km13.109 mi
25 km15.534 mi
30 km18.641 mi
40 km24.855 mi
42.195 km26.219 mi
50 km31.069 mi
60 km37.282 mi
70 km43.496 mi
80 km49.71 mi
90 km55.923 mi
100 km62.137 mi
120 km74.565 mi
150 km93.206 mi
200 km124.274 mi
250 km155.343 mi
300 km186.411 mi
400 km248.548 mi
500 km310.686 mi
1,000 km621.371 mi
Miles to kilometers conversion table
mikm
1 mi1.609 km
2 mi3.219 km
3 mi4.828 km
5 mi8.047 km
6.2 mi9.978 km
10 mi16.093 km
13.1 mi21.082 km
20 mi32.187 km
26.2 mi42.165 km
50 mi80.467 km
100 mi160.934 km

The km to miles formula

A mile is defined as exactly 1,609.344 meters, so one kilometer is 1,000 ÷ 1,609.344 = 0.621371 miles. The formula is miles = kilometers × 0.621371.

Worked examples: 15 km × 0.621371 = 9.32 miles; 80 km × 0.621371 = 49.71 miles; 200 km × 0.621371 = 124.27 miles.

A quick mental shortcut

For a fast estimate, multiply kilometers by 6 and divide by 10, then add a little: 100 km × 0.6 = 60, plus about 2 = 62 miles. The exact answer is 62.14 miles. For miles to km, multiply by 1.6: 5 miles × 1.6 = 8 km (exactly 8.05 km).

Running distances in miles

Race distances are a common reason to convert. A 5K is 3.107 miles, a 10K is 6.214 miles, a half marathon (21.0975 km) is 13.109 miles and a full marathon (42.195 km) is 26.219 miles.

In short

How to use the Km to Miles Converter

  1. Type the amount, for example 10 km.
  2. Pick the unit you want, for example mi.
  3. Use the swap button to convert the other way, and the decimal places setting to round the answer.
  4. Read the result. It updates as you type, so you can change any value and compare.

Quick reference

mi to km

mikm
0.5 mi0.804672 km
1 mi1.609344 km
2 mi3.218688 km
5 mi8.04672 km
10 mi16.09344 km
25 mi40.2336 km
50 mi80.4672 km
100 mi160.9344 km
250 mi402.336 km
1,000 mi1,609.344 km
Screenshot of the Km to Miles Converter on this site with a worked example filled in
Screenshot: the Km to Miles Converter with the example values entered.

Accuracy

How we checked this

We compared 4 results from this calculator with values we worked out independently, using exact decimal arithmetic and the published definitions, on October 26, 2026. 4 of 4 matched to the precision shown.

InputIndependent valueThis pageMatch
100 km → mi62.13711962.137119Yes
50 km → mi31.0685631.06856Yes
42.195 km → mi26.21875726.218757Yes
5 mi → km8.046728.04672Yes

From the source

The meter was once defined by a physical artifact - two marks inscribed on a platinum-iridium bar, like these from the NIST Museum.

Source: NIST: SI units, length

Sources

GOOD TO KNOW

Frequently asked questions

How many miles is 100 km?

100 km is 62.1371 miles.

How many miles is 50 km?

50 km is 31.0686 miles.

How many miles is 500 km?

500 km is 310.686 miles.

How many miles is 15 km?

15 km is 9.32057 miles.

How many miles is 80 km and 200 km?

80 km is 49.7097 miles and 200 km is 124.274 miles.

How many km is 5 miles?

5 miles is 8.04672 kilometers.

How is this conversion calculated?

Convert the source measurement to meters, then divide by the target unit’s value in meters. Exact definitions include 1 inch = 0.0254 meters and 1 mile = 1,609.344 meters.

Can I reverse the conversion?

Yes. Select the swap button between the fields to reverse the source and destination units instantly.

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