Meters per second (m/s) is the SI base unit for speed and velocity, representing the distance in meters traveled during one second. It is the standard unit in physics, engineering, and scientific research, used to describe everything from falling objects to fluid flow rates. One meter per second equals exactly 3.6 kilometers per hour or approximately 2.237 miles per hour.

Feet per second (ft/s) is an imperial speed unit commonly used in ballistics, fluid dynamics, and engineering calculations within the United States. Projectile velocities, pipe flow rates, and conveyor belt speeds are often expressed in ft/s in American technical documentation. One foot per second equals exactly 0.3048 meters per second or about 0.6818 miles per hour.