Speed Unit Converter
Easily convert between different speed units—metric, imperial, nautical, and more.
Result
3.6 km_h
Frequently Asked Questions
What is speed and how is it measured?
Speed is the rate at which an object covers distance over a period of time. It's commonly measured in units like kilometers per hour (km/h), miles per hour (mph), or meters per second (m/s).
Why are there different units for speed?
Different speed units are used for convenience, historical reasons, and specific contexts. For example, knots are used in maritime and aviation, while mph is common for road speeds in some countries and km/h in others.
What is a 'knot' in speed measurement?
A knot is a unit of speed equal to one nautical mile per hour, which is approximately 1.852 km/h or 1.151 mph. It's primarily used in maritime and aviation navigation.
What does 'Mach number' represent?
Mach number represents the ratio of an object's speed through a fluid to the speed of sound in that fluid. Mach 1 is the speed of sound; Mach 2 is twice the speed of sound.
How do common speed units like km/h and mph compare?
Kilometers per hour (km/h) and miles per hour (mph) are standard for road speeds. 1 mph is approximately 1.60934 km/h, and conversely, 1 km/h is approximately 0.62137 mph.
What is the significance of the speed of light (c)?
The speed of light in a vacuum (c) is a universal physical constant, approximately 299,792,458 meters per second. It's the maximum speed at which all energy, matter, and information can travel in the universe.