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Kilometers per hour to miles per hour converter

Convert km/h to mph, both ways.

Type a speed in kilometers per hour and read the exact miles per hour, or type mph to convert back. The result updates live, with meters per second and knots for context and a one-click copy.

Your speed

km/h
mph

Edit either box. The formula is mph = km/h times 0.621371, and km/h = mph times 1.60934.

100 km/h in mph
0 mph
62.1371 mph
Miles per hour62.14
Kilometers per hour (full bar)100
Meters per second
27.778
Knots
54
Feet per second
91.13
Road context
expressway

What this means

    Reference speeds, side by side

    km/hmph The green bar is always about 62 percent of the dark bar, because 1 km/h equals 0.621371 mph at every speed.

    Speed milestones

    50 km/h
    31.07 mph
    Typical urban speed limit across Europe and much of the world.
    100 km/h
    62.14 mph
    Common rural and expressway limit, close to 60 mph.
    130 km/h
    80.78 mph
    Motorway limit in many countries and the German autobahn advisory speed.
    350 km/h
    217.48 mph
    Roughly the top speed an F1 car reaches on a long straight.

    Common km/h to mph values

    Kilometers per hourmphmph (rounded)Where you see it

    How the conversion works

    Conversion Factor

    1 km/h equals 0.6214 mph. Multiply km/h by 0.6214 to get mph, or divide by 1.609. Same factor as converting km distance to miles.

    International Driving

    Reading European speed limits, comparing supercar specs (often listed in km/h), and understanding global racing reports all need km/h → mph translation. F1 cars hitting 350 km/h equal 217 mph.

    Reference Speeds

    50 km/h = 31 mph (urban limit). 80 km/h = 50 mph. 100 km/h = 62 mph. 120 km/h = 75 mph. 130 km/h = 81 mph. 200 km/h = 124 mph.

    Common questions

    100 km/h is how many mph?

    100 km/h = 62.14 mph.

    German autobahn 130 limit in mph?

    130 km/h = 80.78 mph, similar to many US highway limits.

    F1 top speed?

    F1 cars reach about 350 km/h (217 mph) on long straights with modern aerodynamics.

    All conversion runs in your browser. Nothing is uploaded. 1 mile is exactly 1.609344 km by international definition, so these speed results are precise, not approximate.