Speed Calculator

Speed is calculated by dividing the distance traveled by the time taken to travel that distance. The formula is: Speed = Distance ÷ Time. For example, if you travel 100 kilometers in 2 hours, your speed would be 50 kilometers per hour.

Common units of speed include kilometers per hour (km/h), miles per hour (mph), meters per second (m/s), feet per second (ft/s), knots (nautical miles per hour), and Mach (ratio of speed to the speed of sound). Different units are used in different contexts – km/h and mph for road vehicles, m/s for scientific applications, knots for maritime and aviation, and Mach for high-speed aircraft.

To convert between different speed units, you need to know the conversion factors. For example: 1 km/h = 0.621371 mph, 1 m/s = 3.6 km/h, 1 knot = 1.852 km/h, and Mach 1 is approximately 1235 km/h at sea level. Our calculator automatically converts between all common speed units for you.

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that refers to the rate at which an object changes its position. Speed only has magnitude, while velocity has both magnitude and direction. For example, a car traveling north at 60 km/h has a speed of 60 km/h and a velocity of 60 km/h north.

Average speed is calculated by dividing the total distance traveled by the total time taken, regardless of any changes in speed during the journey. Instantaneous speed is the speed of an object at a specific moment in time. For example, if you drive 60 km in 1 hour but stop for 15 minutes, your average speed is 60 km/h, but your instantaneous speed varies between 0 km/h (when stopped) and your driving speed.