Convert Kilometers per Hour ↔ Miles per Hour
Type in either box — results update instantly.
Kilometers/hour (km/h)
Miles/hour (mph)
Formula
mph = km/h × 0.621371192 | km/h = mph ÷ 0.621371192
Conversion Deck
Convert Kilometers per Hour to Miles per Hour
This km/h to mph converter helps you easily convert between metric and imperial speed units. It’s perfect for comparing speed limits, vehicle performance, running pace, or travel distances in different regions.
The conversion formula is mph = km/h × 0.621371.
For example, 100 km/h equals 62.1371 mph.
To convert the other way around, use km/h = mph ÷ 0.621371.
The calculator updates results instantly and works with decimals for precise speed conversions. Whether you’re planning a road trip or checking pace metrics, this tool provides quick, reliable results.
You can also explore the pressure converter for tire calibration or the distance converter for travel planning. All tools are part of Conversion Deck — your all-in-one set of everyday conversion calculators.