Speed Converter Calculator
Enter a speed in any unit to see it instantly converted into four common speed units.
Speed Converter Calculator
Converts a speed between meters per second, kilometers per hour, miles per hour and knots all at once.
This calculator converts a single speed value into four widely used speed units at once — meters per second, kilometers per hour, miles per hour and knots — useful for anything from checking a vehicle's speedometer reading in a different unit to converting wind speed or aircraft/marine speed reported in knots into more familiar road-speed units.
Example
- With the default values shown above, this calculator returns: Meters per Second ≈ 1 m/s; Kilometers per Hour ≈ 3.6 km/h; Miles per Hour ≈ 2.237 mph; Knots ≈ 1.944 kn.
Frequently Asked Questions
What is a knot?
A knot is one nautical mile per hour, a unit commonly used in aviation and maritime navigation, roughly equal to 1.15 mph or 1.85 km/h.
Which unit should I enter my speed in?
Use whichever unit your original measurement is in — set it on the Speed field's unit selector and every result recalculates from that value.
Sources
- Standard formula, publicly documented method