Speed Converter
Convert between mph, km/h, m/s, knots and more.
1 km/h = 0.62137119 mph
1 km/h in other units
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How It Works
Enter a value
Type the amount you want to convert into the From field.
Pick your units
Choose the source unit and the target speed unit from the dropdowns.
Read the result
The converted value appears instantly, plus a table of all other units.
The Speed Converter instantly converts between 7 different speed units. Convert between mph, km/h, m/s, knots and more. All calculations happen locally in your browser, so conversions are immediate and your data never leaves your device.
Need a different measurement? Browse the full set of converters — length, weight, volume, temperature, speed, area, pressure, energy, power, data and more — from the unit converter hub.
Frequently Asked Questions
How do I convert kilometer / hour to mile / hour?
Enter a value in the "From" box, make sure the unit is set to Kilometer / hour, then choose Mile / hour in the "To" box. The converted result appears instantly, along with the value expressed in every other speed unit.
What speed units are supported?
This converter supports 7 units: Meter / second, Kilometer / hour, Mile / hour, Foot / second, Knot, Kilometer / second, Mach (sea level).
Is the Speed converter free and accurate?
Yes. It is completely free, requires no sign-up, and runs entirely in your browser using internationally standardized conversion factors, so results are accurate to many significant figures.
Build with our Speed Converter API
Integrate our high-speed conversion engine directly into your own applications. Get free api keys for speed conversion api and more.