KPH to MPH (Km/h to Miles per Hour) Converter
1 km/h = 0.621371 mph. Enter any speed in kilometres per hour to get the mph equivalent.
Formula:1 km/h = 0.621371 mph
⇄ Switch to mph To km/hkm/h to mph — common values
1 km/h0.621372 mph
10 km/h6.2137169 mph
30 km/h18.641151 mph
60 km/h37.282301 mph
100 km/h62.137169 mph
200 km/h124.27434 mph
1,000 km/h621.37169 mph
How to convert km/h To mph
To convert km/h to mph, use the formula: 1 km/h = 0.621371 mph. Enter any value in the input field above and the result appears instantly. Click the ⇄ button or use the “Switch to mph To km/h” link to reverse the conversion.
All conversions use precise mathematical constants validated against international SI standards (NIST and ISO 80000) and are accurate to 8 significant figures.
Frequently Asked Questions
What is the formula to convert km/h To mph?
1 km/h = 0.621371 mph. 1 km/h = 0.621371 mph. Enter any speed in kilometres per hour to get the mph equivalent.
Is this converter free?
Yes — completely free, no registration required. Works instantly in your browser.
How do I convert mph To km/h?
Use the mph To km/h converter or click the ⇄ switch button above.
More Velocity conversions
Need more velocity conversions?
The full converter supports all unit combinations