Speed Converter
Convert speed among m/s, km/h, mph, knots, and ft/s through an m/s reference.
How to use
- Enter a speed, then select the current and comparison units from m/s, km/h, mph, knot, and ft/s.
Capabilities and scope
Compare linear speed units, including the knot commonly used in marine and aviation contexts.
How it works
Values are normalized to m/s using 1 km/h = 0.2777777778 m/s, 1 mph = 0.44704 m/s, and 1 knot = 0.5144444444 m/s.
Example
100 km/h is about 27.7778 m/s or 62.1371 mph.
Useful for
- Compare vehicle speeds in km/h and mph
- Convert wind speed between m/s and knots
- Translate ft/s values into SI speed
Before you use it
- It changes units of a known speed; it does not calculate average speed from distance and time.
Standards and references
Frequently asked questions
How is a knot related to km/h?
One knot is one nautical mile per hour, exactly 1.852 km/h.