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Speed: Enter a value to convert
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Switch between kilometers per hour (kph) and miles per hour (mph) with this tool—ideal for road trips, racing, or international speed limits!
Kilometers per hour (kph) is a metric speed unit equal to 0.621371192 miles per hour. Miles per hour (mph) is an imperial unit used for velocity.
Kph emerged with the metric system in the late 18th century in France. Mph evolved from the mile, standardized in England by 1593, paired with hourly rates later.
Kph is standard in most countries for traffic and weather speeds. Mph is used in the US, UK, and a few others for driving and aviation.
Multiply kph by 0.621371192 to get mph. For example, 100 kph × 0.621371192 = 62.1371192 mph.
Yes, it uses the precise standard of 1 kph = 0.621371192 mph for reliable results.
Sure! Toggle the button to switch from kph to mph or mph to kph.