Speed Converter
Convert speed between km/h, mph, m/s, ft/s, and knots. Exact conversions with a one-click swap of direction.
Independently verified for accuracy
Calculator by Toolsloft ↗- Result
- 0.621371 Miles per hour (mph)
- Conversion
- 1 Kilometers per hour (km/h) = 0.621371 Miles per hour (mph)
Convert speed between kilometers per hour, miles per hour, meters per second, feet per second, and knots. Enter a speed, choose the two units, and read the answer as you type. It covers the everyday km/h to mph question as well as m/s for physics and knots for sailing and aviation.
How this is calculated
Every unit is defined against meters per second. A mile per hour is 0.44704 m/s exactly (1609.344 meters over 3600 seconds), a km/h is 1000 over 3600 m/s, and a knot is one nautical mile of 1852 meters per hour. The tool converts your speed to meters per second and then to the target unit, so km/h to mph and back stay consistent.
How to use
- Type the speed you want to convert.
- Choose the unit you are starting from.
- Choose the unit you want the answer in.
- Read the converted speed, or press Swap units to reverse it.
Examples
- km/h to mph:
100 km/h = 62.137119 mph - mph to km/h:
60 mph = 96.56064 km/h - m/s to km/h:
1 m/s = 3.6 km/h
FAQ
- How do I convert km/h to mph?
- Divide the km/h value by 1.609344, or multiply by about 0.6214. So 100 km/h is about 62.14 mph.
- What is a knot?
- A knot is one nautical mile per hour, which is 1.852 km/h or about 1.15 mph. It is the standard speed unit for ships and aircraft.