KPH to MPH Converter
Convert kilometers per hour to miles per hour instantly. Useful for international driving and travel.
Formula: km/h × 0.621371 = mph
Common Conversions
Why Use Our KPH to MPH Converter?
Instant Results
Type any kilometers per hour value and see the miles per hour result immediately as you type.
Highly Accurate
Uses the exact conversion factor. km/h × 0.621371 = mph
Swap Direction
Easily convert Miles per Hour back to Kilometers per Hour with the swap button. No need to visit a different page.
One-Click Copy
Copy the converted result to your clipboard instantly with the Copy button.
Common Values Table
See a quick reference table of 9 common kilometers per hour values and their miles per hour equivalents.
100% Private
All conversions happen in your browser. Nothing is sent to a server or stored anywhere.
Frequently Asked Questions
How many miles per hour in a kilometers per hour?
1 km/h = see the formula above mph. Use the formula: km/h × 0.621371 = mph.
How to convert kilometers per hour to miles per hour?
To convert kilometers per hour to miles per hour, use the formula: km/h × 0.621371 = mph. For example, 100 km/h = 62.137 mph.
Is this kph to mph converter accurate?
Yes. The converter uses the internationally accepted exact conversion factor. The result is accurate to at least 6 significant figures.
Can I convert miles per hour back to kilometers per hour?
Yes. Click the "Swap direction" button to reverse the conversion. The current result becomes the new input automatically.
Does this work on mobile?
Yes. The converter works on all devices — phones, tablets, and desktops. All calculations happen in your browser.
Is my data stored anywhere?
No. All conversions run entirely in your browser. Nothing is uploaded, logged, or stored.