mph to kph
Convert miles per hour to kilometers per hour.
Open tool →Free online converter category
Speed Conversion Tools for mph, km/h, m/s and Knots
Convert speed units including mph, km/h, m/s, ft/s, knots, and Mach with free online speed conversion tools.
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Quick Converter
Use this quick converter or open a focused page below.
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kph to mph
Convert kilometers per hour to miles per hour.
Open tool →m/s to mph
Convert meters per second to miles per hour.
Open tool →mph to m/s
Convert miles per hour to meters per second.
Open tool →knots to mph
Convert knots to mph.
Open tool →feet per second to mph
Convert feet per second to mph.
Open tool →Mach to mph
Convert Mach to mph reference.
Open tool →Speed converter
Open a general speed converter.
Open tool →Common Formulas and References
Use these references as a quick guide. The converter or linked tools calculate the result automatically.
Referencemph = km/h × 0.621371
Referencekm/h = mph × 1.609344
Referencem/s = km/h ÷ 3.6
Speed Conversion Tools FAQ
Common questions about this category.
How many km/h are in 1 mph?
1 mph equals 1.609344 km/h.
How many mph are in 1 km/h?
1 km/h equals approximately 0.621371 mph.
What is a knot?
A knot is a speed unit used in marine and aviation contexts.