📏 Length
km to mi Converter
Convert km to mi instantly with a reference conversion table.
Quick answer: To convert km to mi, multiply by 0.621371. For example, 1 km = 0.621371 mi. Use the calculator below for any value.
km to mi
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Common conversions
| km | mi |
|---|
Formula:
How to convert km to mi
1
Enter your value
Type the number of km you want to convert into the left box. The result in mi appears instantly in the right box. You can also type into the right box to convert in the other direction.
2
Use the swap button
Click the ⇄ Swap button to reverse the conversion — mi to km. Your current value carries across so you don't have to re-enter anything.
3
About km and mi
km and mi are common length measurements.
📊 Common conversions at a glance
| km | mi |
|---|---|
| 0.1 | 0.06214 |
| 0.5 | 0.3107 |
| 1 | 0.6214 |
| 2 | 1.243 |
| 5 | 3.107 |
| 10 | 6.214 |
Reviewed for 2026. km ↔ mi conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.
Frequently asked questions
How do I convert km to mi?
To convert km to mi, multiply by 0.621371. Or use the calculator above for instant results.
How many mi are in 1 km?
1 km equals 0.621371 mi.
Is the km to mi converter free?
Yes, the km to mi converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.