Kilometers to Miles Converter
Convert kilometers to miles — and back — in an instant. Type a value in either box and the answer updates live. It’s accurate, free and completely private: the conversion runs entirely on your device.
- 🔒 100% private — no uploads
- 🆓 Free, no watermark
- 📱 Works on any device
How to convert
- 1
Choose your units
The tool opens on the most common pairing. Change either unit from its dropdown, or hit the swap button to flip the direction.
- 2
Type a value
Enter a number in either box. The other side updates instantly as you type — convert either way without pressing a button.
- 3
Copy or compare
Copy the result to your clipboard, or scan the common-values table below for quick at-a-glance conversions.
Why use Kilometers to Miles Converter?
100% private
Every conversion is computed locally in your browser. Nothing you enter ever leaves your device.
Instant & two-way
Results update live as you type, in either direction — no “convert” button and no page reloads.
Accurate
Conversions use exact, standards-based factors, so you get the same answer a trusted reference would.
Works on any device
No install and no account — it runs in any modern browser on desktop, tablet or phone.
The kilometers to miles formula
One kilometer is about 0.621371 miles, so multiply kilometers by 0.621371 (or divide by 1.609344): mi = km ÷ 1.609344. For example, 100 km × 0.621371 = 62.14 mi. A handy shortcut is to multiply km by 0.6 for a quick approximation.
Speed limits and race distances
100 km/h is about 62 mph, a 10K run is 6.21 miles, and 42.195 km (a marathon) is 26.22 miles. Multiply by 0.6 in your head and you will rarely be off by more than a few percent.
Frequently asked questions
How do I convert kilometers to miles?
Type the number of kilometers in the first box and read the result in miles — it updates as you type. To go the other way, type in the miles box instead.
Does anything get uploaded to a server?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is uploaded, stored or logged, and it keeps working offline once the page has loaded.
Is it free?
Yes — completely free, no account, no watermark and no limits.