Length converter
Kilometers to Miles
Converting Kilometers to Miles is a single multiplication when you know the factor. One km equals 0.62137119 mi, so multiply the value in km by 0.62137119. The calculator below works in both directions and accepts decimals.
Formula 1 km = 0.62137119 mi
Need the other direction? Miles to Kilometers.
How to convert Kilometers to Miles
The kilometre is 1,000 metres and is the standard road-distance unit in most countries. The international mile is exactly 1,609.344 metres, or 5,280 feet.
To convert Kilometers to Miles, multiply the value in km by 0.62137119. For example, 10 km × 0.62137119 = 6.213712 mi. This works because the ratio between the two units is constant for every value in length.
Worked examples
| km | mi |
|---|---|
| 1 km | 0.62137119 mi |
| 2.5 km | 1.553428 mi |
| 5 km | 3.106856 mi |
| 10 km | 6.213712 mi |
| 25 km | 15.53428 mi |
| 50 km | 31.06856 mi |
| 100 km | 62.137119 mi |
Reverse conversion
| mi | km |
|---|---|
| 1 mi | 1.609344 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
When this conversion is useful
This is the calculation you need when you are working across metric and imperial measurements, shopping abroad or reading a spec sheet. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 km is 621.371192 mi.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
km to mi conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Kilometers (km) | Miles (mi) |
|---|---|
| 1 km | 0.62137119 mi |
| 2 km | 1.242742 mi |
| 3 km | 1.864114 mi |
| 4 km | 2.485485 mi |
| 5 km | 3.106856 mi |
| 6 km | 3.728227 mi |
| 7 km | 4.349598 mi |
| 8 km | 4.97097 mi |
| 9 km | 5.592341 mi |
| 10 km | 6.213712 mi |
| 11 km | 6.835083 mi |
| 12 km | 7.456454 mi |
| 13 km | 8.077825 mi |
| 14 km | 8.699197 mi |
| 15 km | 9.320568 mi |
| 16 km | 9.941939 mi |
| 17 km | 10.56331 mi |
| 18 km | 11.184681 mi |
| 19 km | 11.806053 mi |
| 20 km | 12.427424 mi |
| 21 km | 13.048795 mi |
| 22 km | 13.670166 mi |
| 23 km | 14.291537 mi |
| 24 km | 14.912909 mi |
| 25 km | 15.53428 mi |
| 26 km | 16.155651 mi |
| 27 km | 16.777022 mi |
| 28 km | 17.398393 mi |
| 29 km | 18.019765 mi |
| 30 km | 18.641136 mi |
| 31 km | 19.262507 mi |
| 32 km | 19.883878 mi |
| 33 km | 20.505249 mi |
| 34 km | 21.126621 mi |
| 35 km | 21.747992 mi |
| 36 km | 22.369363 mi |
| 37 km | 22.990734 mi |
| 38 km | 23.612105 mi |
| 39 km | 24.233476 mi |
| 40 km | 24.854848 mi |
| 41 km | 25.476219 mi |
| 42 km | 26.09759 mi |
| 43 km | 26.718961 mi |
| 44 km | 27.340332 mi |
| 45 km | 27.961704 mi |
| 46 km | 28.583075 mi |
| 47 km | 29.204446 mi |
| 48 km | 29.825817 mi |
| 49 km | 30.447188 mi |
| 50 km | 31.06856 mi |
| 60 km | 37.282272 mi |
| 70 km | 43.495983 mi |
| 80 km | 49.709695 mi |
| 90 km | 55.923407 mi |
| 100 km | 62.137119 mi |
Frequently asked questions
How many Miles are in 1 Kilometers?
1 km equals 0.62137119 mi.
How do I convert Kilometers to Miles?
Multiply the km value by 0.62137119. Example: 25 km = 15.53428 mi.
What is 2.5 km in mi?
2.5 km = 1.553428 mi.
Is the km to mi conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.