Speed Converter
Enter a speed below to convert it instantly between kilometers per hour, miles per hour, meters per second, knots and feet per second.
Convert speed
Your value in every unit
How to convert speed
- Enter the speed value you want to convert.
- Pick the unit you're converting from and the unit you want to convert to.
- Read the converted result instantly, or scroll down to see your value in every supported unit at once.
Common speed conversion factors
| Unit | Equal to |
|---|---|
| 1 km/h | 0.621371 mph |
| 1 mph | 1.609344 km/h |
| 1 m/s | 3.6 km/h |
| 1 knot | 1.852 km/h |
| 1 ft/s | 1.09728 km/h |
FAQ
Is this speed converter really free, with no sign-up?+
Yes. The tool runs entirely with JavaScript in your browser — there's no account, no API key, and no limit on how often you can use it.
How do I convert km/h to mph?+
Divide the speed in km/h by 1.609344 to get mph. For example, 100 km/h converts to about 62.14 mph.
What is a knot?+
A knot is one nautical mile per hour, equal to about 1.852 km/h. It's the standard speed unit used in aviation and maritime navigation.
How is m/s used differently from km/h?+
Meters per second is the SI unit for speed and is standard in physics and engineering calculations, while km/h and mph are more common in everyday and road-traffic contexts.
What units are supported?+
Kilometers per hour, miles per hour, meters per second, knots, and feet per second are all supported, in any combination.
Tools for Unit Conversion
How This Converter Works
Your value is converted live between speed units with JavaScript using standard internationally recognized conversion factors — nothing you enter is uploaded to a server or stored anywhere.
Last updated: August 28, 2026.
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