Speed Converter
Convert between speed units: km/h, mph, m/s, knots, ft/s, mach, and more.
Frequently Asked Questions
How many mph is 100 km/h?
100 km/h equals approximately 62.1371 mph. To convert km/h to mph, multiply by 0.621371.
What is a knot?
A knot is a unit of speed equal to one nautical mile per hour, approximately 1.852 km/h or 1.15078 mph.
What is Mach number?
Mach number is the ratio of an object's speed to the speed of sound. Mach 1 equals approximately 343 m/s (1235 km/h) at sea level.
Is my data sent to a server?
No, all calculations are done entirely in your browser.
