Kilometers to Miles Converter
Instant km to mi conversion. Enter a number and get the answer right away.
How to Convert km to mi
1 km equals 0.621371 mi. To convert km to mi, multiply by 0.621371 (mi = km × 0.621371). For example, 10 km is 6.2137 mi. The calculator above applies the same conversion in both directions, so you can also type a value in mi to get km.
mi = km × 0.621371
One km equals 0.621371 mi. Use the formula below for any number.
km to mi Conversion Table
| km | mi |
|---|---|
| 1 km | 0.621371 mi |
| 2 km | 1.242742 mi |
| 3 km | 1.864114 mi |
| 5 km | 3.106856 mi |
| 10 km | 6.213712 mi |
| 15 km | 9.320568 mi |
| 20 km | 12.427424 mi |
| 25 km | 15.53428 mi |
| 50 km | 31.06856 mi |
| 75 km | 46.602839 mi |
| 100 km | 62.137119 mi |
| 150 km | 93.205679 mi |
| 200 km | 124.274238 mi |
| 500 km | 310.685596 mi |
| 1000 km | 621.371192 mi |
Common km to mi Conversions
When You Need This Conversion
Useful for road signs, running distances, travel planning, and reading height and room measurements.
Units and Conventions
This page uses the international mile: 1 statute mile = 1,609.344 m exactly. A nautical mile is 1,852 m, and 1 inch is exactly 2.54 cm. US survey feet and survey miles differ slightly from international feet and miles.
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Frequently Asked Questions
How many mi are in 1 km?
1 km equals 0.621371 mi. The formula is mi = km × 0.621371.
What is the km to mi formula?
Use mi = km × 0.621371. The calculator above applies it instantly and also works in reverse.
Can I convert mi back to km?
Yes. Type a value into the second field and the calculator converts in the opposite direction.
Is this converter free and accurate?
Yes. It runs in your browser with no signup. Results come from the exact conversion factor shown on this page and are rounded to 6 decimal places.
Which standard does this page use?
See the Units and Conventions section above - it lists the exact definition used here and the alternatives common in other countries.
Does it work on my phone?
Yes. The calculator is designed for phones first, with large inputs and instant results as you type.